Oil composition for preparing coffee mate and preparation method thereof

文档序号:247252 发布日期:2021-11-16 浏览:28次 中文

阅读说明:本技术 一种可用于制备咖啡伴侣的油脂组合物及其制备方法 (Oil composition for preparing coffee mate and preparation method thereof ) 是由 王永华 徐青青 黄祥杰 徐婉莉 杨嘉欣 罗日明 于 2021-08-19 设计创作,主要内容包括:本发明涉及一种可用于制备咖啡伴侣的油脂组合物及其制备方法,发明人采用橄榄油基甘油二酯和大豆油基甘油二酯进行复配,并通过控制橄榄油基甘油二酯和大豆油基甘油二酯的恰当比例,结合油脂组合物中合适含量其他原料的成分和性质,制备得到一种适于咖啡伴侣制备的油脂组合物。采用恰当比例的该油脂组合物所制备得到的咖啡伴侣具有良好的低温(0℃)溶解性和稳定性。此外,本发明咖啡伴侣中油脂组合物的构成,还解决了常规咖啡伴侣存在的高热量、高饱和脂肪酸的问题,能够适用于目前低温速溶咖啡的市场,弥补低温咖啡中咖啡伴侣市场的空缺。(The invention relates to an oil composition for preparing coffee mate and a preparation method thereof. The coffee mate prepared by adopting the grease composition in a proper proportion has good low-temperature (0 ℃) solubility and stability. In addition, the composition of the oil composition in the coffee mate also solves the problems of high heat and high saturated fatty acid of the conventional coffee mate, can be suitable for the market of the low-temperature instant coffee at present, and makes up the vacancy of the coffee mate market in the low-temperature coffee.)

1. The grease composition is characterized by comprising the following components in percentage by weight: 60-90% of diglyceride, 5-30% of glyceryl monostearate and 5-7% of soybean oil;

the diglyceride is obtained by compounding olive oil-based diglyceride and soybean oil-based diglyceride according to the weight ratio of 1:0.6-1: 4.

2. The fat and oil composition according to claim 1, wherein the weight ratio of the olive oil-based diglyceride to the soybean oil-based diglyceride in the fat and oil composition is 1:0.8 to 1:4, more preferably 1:0.8 to 1:2, and still more preferably 1:1 to 1: 2.

3. The grease composition according to any one of claims 1 to 2, characterized by comprising the following components in percentage by mass: 80-90% of diglyceride, 5-10% of glyceryl monostearate and 5-6% of soybean oil.

4. A coffee creamer comprising the fat composition of any of claims 1 to 3.

5. The coffee creamer according to claim 4, wherein the creamer comprises the fat composition according to any one of claims 1 to 3 in an amount of 5 to 20%, preferably 10 to 18%, based on the total amount of the creamer.

6. A coffee chaperone according to any one of claims 4-5 characterised in that it is prepared by the following process:

(1) water phase: heating emulsifier, syrup, essence and water to 75-85 deg.c and high speed mixing;

(2) oil phase: adding the grease composition according to any one of claims 1 to 3 to the slurry and homogenizing for 5 to 10 minutes by a high-cut homogenizer at 5500rpm/min to 6500 rpm/min;

(3) homogenizing: after mixing the aqueous phase and the oil phase, further homogenizing at a high pressure of about 200 to 300bar by a high pressure homogenizer;

(4) spray drying: obtaining the powdered coffee creamer by spray drying at an inlet temperature of 160 ℃ to 170 ℃ and an outlet temperature setting of 80 ℃ to 90 ℃.

7. The coffee creamer preparation process of claim 6, wherein the aqueous phase in step (1) of the coffee creamer preparation process comprises: 41.9-68.9% of water, 22-30% of sugar alcohol, 2.5-11% of emulsifier and 0.1-1.0% of essence.

8. The coffee creamer preparation process of claim 7, wherein the aqueous phase in step (1) of the coffee creamer preparation process comprises: 51.2-63.1% of water, 25-28% of sugar alcohol, 2.5-6% of emulsifier and 0.1-0.5% of essence.

9. The process of any one of claims 6-8, wherein the emulsifier comprises at least one of sodium caseinate, sodium stearoyl lactylate, and sodium tripolyphosphate.

10. A beverage product comprising the coffee creamer of any one of claims 4 to 5 or obtained by the process of making the coffee creamer of any one of claims 6 to 9.

Technical Field

The invention relates to the field of food processing, in particular to a grease composition for preparing coffee mate and a preparation method thereof.

Background

Coffee chaperones are typically added to coffee prior to its consumption in order to moderate the intense bitterness and sourness of the coffee. The coffee mate which is commonly used at present is mainly in a powder type, and is also called as non-dairy creamer. The milk powder is a soft, fine and rich milk powder product which is prepared by taking vegetable oil as a main raw material, simultaneously adding a proper amount of syrup, milk protein, an emulsifier, a stabilizer and the like, mixing, emulsifying, homogenizing, spraying and drying.

The vegetable oil is an important component of the coffee mate, the main specification of the coffee mate in the current domestic and foreign markets is that the fat content is 33 percent, the vegetable oil can improve the composition structure of the coffee mate, give a fine and smooth appearance and produce a rich and thick taste, and simultaneously, the vegetable oil plays a role in whitening due to the scattering of fat balls to light. Generally, vegetable oil is mostly in a liquid state at normal temperature, and is not suitable to be used as special oil for coffee mate due to the lack of the essential characteristics of hardness, consistency, coagulability, viscosity and the like of stearin. Meanwhile, most of vegetable oil contains unsaturated fatty acids such as oleic acid and linoleic acid with a high proportion, the chemical properties are unstable, and rancidity, deterioration and the like are caused by oxidation, so that the vegetable oil must be purposefully modified and refined.

Hydrogenated vegetable oil, as one of the improvement of vegetable oil, is the product of hydrogenation catalysis of ordinary vegetable oil under certain temperature and pressure, because it not only can lengthen the shelf life, can also make the cake crisp, meanwhile, because of the high melting point, can keep the solid shape under the room temperature, therefore is used in the food processing extensively, but because the saturated fatty acid content of the hydrogenated vegetable oil is too high, there is higher trans fatty acid at the same time, very easy to cause a series of cardiovascular diseases such as the rise of blood fat, coronary heart disease, etc. In the 21 st century advocating a healthy diet, the coffee chaperones currently available on the market clearly do not meet national requirements.

Also, the characteristic of coffee creamer that requires a higher temperature to melt also creates a greater problem today when cold drinks are increasingly abundant. A large amount of low-temperature instant products appear in coffee products, hot water is not needed to brew coffee, the requirement of summer is met, but the current low-temperature coffee mate is still lack of commodities and cannot adapt to the market of low-temperature coffee. Therefore, it is imperative to develop a coffee chaperone having extremely high solubility at low temperatures.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a fat and oil composition which can be used for preparing a coffee creamer.

The specific technical scheme is as follows:

the grease composition comprises the following components in percentage by mass: 60-90% of diglyceride, 5-30% of glyceryl monostearate and 5-7% of soybean oil; the diglyceride is obtained by compounding olive oil-based diglyceride and soybean oil-based diglyceride, wherein the olive oil-based diglyceride and the soybean oil-based diglyceride are compounded according to the weight ratio of 1:0.6-1: 4.

It is also an object of the present invention to provide a coffee creamer.

The technical scheme is as follows:

a coffee mate contains the above oil and fat composition.

In some embodiments, the coffee creamer comprises the fat composition in an amount of 5-20%, preferably 10-18%, based on the total amount of the creamer.

The invention also aims to provide a preparation process of the coffee mate.

The technical scheme is as follows:

a preparation process of coffee mate comprises the following steps:

(1) water phase: heating emulsifier, syrup, essence and water to 75-85 deg.c and high speed mixing;

(2) oil phase: adding the grease composition into the slurry, and homogenizing for 5-10 minutes by a high-shear homogenizer at 5500-6500 rpm/min;

(3) homogenizing: after mixing the aqueous phase and the oil phase, further homogenizing at a high pressure of about 200 to 300bar by a high pressure homogenizer;

(4) spray drying: obtaining the powdered coffee creamer by spray drying at an inlet temperature of 160 ℃ to 170 ℃ and an outlet temperature setting of 80 ℃ to 90 ℃.

One of the purposes of the invention is to provide a beverage.

The technical scheme for realizing the purpose is as follows:

a beverage contains the coffee mate or the coffee mate obtained by the preparation process of the coffee mate.

Compared with the prior art, the invention has the following beneficial effects:

the inventor of the invention finds that the components and the properties of oil have great influence on the low-temperature (0 ℃) solubility of the coffee mate when preparing the coffee mate, and prepares the oil composition suitable for preparing the coffee mate by deeply exploring, compounding the olive oil-based diglyceride and the soybean oil-based diglyceride by controlling the proper proportion of the olive oil-based diglyceride and the soybean oil-based diglyceride and combining the components and the properties of other raw materials with proper content in the oil composition. The coffee mate prepared by adopting the grease composition in a proper proportion has good low-temperature (0 ℃) solubility and stability. In addition, the composition of the oil composition in the coffee mate also solves the problems of high heat and high saturated fatty acid of the conventional coffee mate, can be suitable for the market of the low-temperature instant coffee at present, and makes up the vacancy of the coffee mate market in the low-temperature coffee.

Drawings

FIG. 1 shows the dissolution effect of the coffee creamer prepared in example 1 when coffee is brewed at a low temperature (0 ℃), wherein A is the state immediately after brewing (0 min); b is the state after brewing and standing for 5 min.

FIG. 2 shows the dissolution effect of the coffee creamer prepared in example 2 when coffee is brewed at a low temperature (0 ℃), wherein A is the state immediately after brewing (0 min); b is the state after brewing and standing for 5 min.

FIG. 3 shows the dissolution effect of a commercially available coffee creamer when brewing coffee at low temperature (0 ℃), where A is the state immediately after brewing (0 min); b is the state after brewing and standing for 5 min.

Detailed Description

The experimental procedures for the following examples, which are not specified in specific conditions, are generally conducted under conventional conditions, and the various conventional chemical reagents used in the examples are commercially available products.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In order that the invention may be more fully understood, reference will now be made to the following description. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

The present invention will be described in further detail with reference to specific examples.

Some embodiments of the invention provide a grease composition, which comprises the following components in percentage by mass: 60-90% of diglyceride, 5-30% of glyceryl monostearate and 5-7% of soybean oil; the diglyceride is obtained by compounding olive oil-based diglyceride and soybean oil-based diglyceride, wherein the olive oil-based diglyceride and the soybean oil-based diglyceride are compounded according to the weight ratio of 1:0.6-1: 4.

In some embodiments, the formulation ratio of the olive oil-based diglyceride to the soybean oil-based diglyceride in the grease composition is 1:0.8-1:4, more preferably 1:0.8-1:2, and still more preferably 1:1-1: 2.

In some embodiments, the formulation ratio of the olive oil-based diglyceride to the soybean oil-based diglyceride in the grease composition is 1: 1.

In some embodiments, the soy oil-based diglyceride and the olive oil-based diglyceride are prepared by respectively hydrolyzing soy oil and olive oil to produce soy oil-based fatty acid or olive oil-based fatty acid, and esterifying glycerol, wherein the hydrolysis reaction is LipaseAys enzyme (Nippon Tianye corporation) from Candida rugosa, and the esterification reaction is Lipozyme RM IM enzyme (Novozyme corporation) from Rhizomucor miehei.

In some embodiments, the content of diglyceride in the soybean oil-based diglyceride is not less than 80%, preferably 80% to 100%, and more preferably 83% to 96%.

In some embodiments, the content of diglyceride in the olive oil-based diglyceride is not less than 80%, preferably 80% to 100%, and more preferably 84% to 96%. In some embodiments, the grease composition comprises the following components in percentage by mass: 80-90% of diglyceride, 5-10% of glyceryl monostearate and 5-6% of soybean oil.

Some embodiments of the invention also provide a coffee mate, which contains the grease composition.

In some embodiments, the coffee creamer comprises the fat composition in an amount of 5-20%, preferably 10-18%, based on the total amount of the creamer.

Some embodiments of the invention also provide a preparation process of the coffee mate.

The technical scheme is as follows:

a preparation process of coffee mate comprises the following steps:

(1) water phase: heating emulsifier, syrup, essence and water to 75-85 deg.c and high speed mixing;

(2) oil phase: adding the grease composition into the slurry, and homogenizing for 5-10 minutes at a high speed of 5500 rpm/min-6500 rpm/min by a high-shear homogenizer;

(3) homogenizing: after mixing the aqueous phase and the oil phase, further homogenizing at a high pressure of about 200 to 300bar by a high pressure homogenizer;

(4) spray drying: obtaining the powdered coffee creamer by spray drying at an inlet temperature of 160 ℃ to 170 ℃ and an outlet temperature setting of 80 ℃ to 90 ℃.

In some of these embodiments, the aqueous phase in step (1) of the above-described coffee creamer preparation process comprises: 41.9-68.9% of water, 22-30% of sugar alcohol, 2.5-11% of emulsifier and 0.1-1.0% of essence.

In some of these embodiments, the aqueous phase in step (1) of the above-described coffee creamer preparation process comprises: 51.2-63.1% of water, 25-28% of sugar alcohol, 2.5-6% of emulsifier and 0.1-0.5% of essence.

In some of these embodiments, the emulsifier comprises at least one of sodium caseinate, sodium stearoyl lactylate, and sodium tripolyphosphate.

Some embodiments of the present invention also provide a beverage containing the above-described coffee chaperone or a coffee chaperone obtained by the above-described coffee chaperone preparation process.

Example 1

The oil and fat composition comprises 90% of soybean oil-based diglyceride and olive oil-based diglyceride (both 1: 1), 5% of glyceryl monostearate, and 5% of soybean oil (commercially available refined soybean oil).

The soybean oil-based diglyceride and the olive oil-based diglyceride are prepared by respectively carrying out hydrolysis reaction on soybean oil and olive oil to generate soybean oil-based fatty acid or olive oil-based fatty acid and then carrying out esterification reaction on the soybean oil-based fatty acid or the olive oil-based fatty acid and glycerol, wherein the hydrolysis reaction adopts Lipase AYS enzyme (Nippon Tianye corporation) from Candida rugosa, the esterification reaction adopts Lipozyme RM IM enzyme (Novozyme corporation) from Rhizomucor miehei, and the content of diglyceride in the soybean oil-based diglyceride in a reaction product is 83.14 percent; the purity of diglyceride in olive oil-based diglyceride is 84.39%; and conventional molecular distillation separation is used to remove fatty acids and monoglycerides, so that high-purity soybean oil-based diglyceride (specifically DAG 95.18%; TAG 3.24%) with a DAG content of about 95% and olive oil-based diglyceride (specifically DAG 94.66%; TAG 3.59%) with a DAG content of about 95% can be obtained.

The coffee mate is prepared by adopting the following formula (weight percentage): 60.9% of water, 25% of sugar alcohol, 10% of a grease composition, 2% of sodium caseinate, 0.5% of glyceryl monostearate, 0.5% of sodium stearyl lactate, 0.1% of sodium tripolyphosphate and 1.0% of vanillic essence.

The preparation method comprises the following specific steps:

emulsifiers (2% sodium caseinate, 0.5% glyceryl monostearate, 0.5% sodium stearoyl lactylate, 0.1% sodium tripolyphosphate) and syrup (25% sugar alcohol) were mixed with 60.9% by weight of drinking water at medium to high speed with heating to 80 ℃ to promote complete hydration. In order to uniformly and stably disperse the fat in the composition, the grease composition is added to the slurry and homogenized by a high-shear homogenizer at a high speed of about 6000rpm (revolutions per minute) for 5 to 10 minutes; the homogenized mixture is further homogenized by means of a high-pressure homogenizer at a high pressure of about 200 to 300 bar. Then spray-drying at an inlet temperature of 160-170 ℃ and an outlet temperature of 80-90 ℃, and further granulating and drying the powder at a temperature of 40-42 ℃ to obtain the powder type coffee mate.

Example 2

The oil and fat composition comprises 90% of soybean oil-based diglyceride and olive oil-based diglyceride (both 1: 1), 5% of glyceryl monostearate, and 5% of soybean oil.

Wherein, the soybean oil-based diglyceride and the olive oil-based diglyceride are both prepared by the preparation method described in the example 1.

The coffee mate is prepared by adopting the following formula (weight percentage): 55.9% of water, 25% of sugar alcohol, 15% of a grease composition, 2% of sodium caseinate, 1% of sodium stearoyl lactylate, 0.1% of sodium tripolyphosphate and 1.0% of vanillic essence.

The preparation method comprises the following specific steps:

emulsifiers (2% sodium caseinate, 0.5% glyceryl monostearate, 0.5% sodium stearoyl lactylate, 0.1% sodium tripolyphosphate) and syrup (25% sugar alcohol) were mixed with 55.9% by weight of drinking water at medium to high speed with heating to 80 ℃ to promote complete hydration. In order to uniformly and stably disperse the fat in the composition, the grease composition is added to the slurry and homogenized by a high-shear homogenizer at a high speed of about 6000rpm (revolutions per minute) for 5 to 10 minutes; the homogenized mixture is further homogenized by means of a high-pressure homogenizer at a high pressure of about 200 to 300 bar. Then spray-drying at an inlet temperature of 160-170 ℃ and an outlet temperature of 80-90 ℃, and further granulating and drying the powder at a temperature of 40-42 ℃ to obtain the powder type coffee mate.

Example 3

The oil and fat composition comprises 66% of soybean oil-based diglyceride and olive oil-based diglyceride (both 1: 2), 27% of glyceryl monostearate, and 7% of soybean oil.

Wherein, the soybean oil-based diglyceride and the olive oil-based diglyceride are both prepared by the preparation method described in the example 1.

The coffee mate is prepared by adopting the following formula (weight percentage): 55.9% of water, 25% of sugar alcohol, 15% of a grease composition, 2% of sodium caseinate, 1% of sodium stearoyl lactylate, 0.1% of sodium tripolyphosphate and 1.0% of vanillic essence.

The specific preparation steps are the same as in examples 1 and 2.

Example 4

The oil and fat composition comprises 90% of soybean oil-based diglyceride and olive oil-based diglyceride (both 1:5), 5% of glyceryl monostearate, and 5% of soybean oil.

Wherein, the soybean oil-based diglyceride and the olive oil-based diglyceride are both prepared by the preparation method described in the example 1.

The coffee mate is prepared by adopting the following formula (weight percentage): 55.9% of water, 25% of sugar alcohol, 15% of a grease composition, 2% of sodium caseinate, 1% of sodium stearoyl lactylate, 0.1% of sodium tripolyphosphate and 1.0% of vanillic essence.

The specific preparation steps are the same as in examples 1 and 2.

Comparative example 1

The oil and fat composition comprises 95% of soybean oil and 5% of glyceryl monostearate. The coffee mate is prepared by adopting the following formula (weight percentage): 60.9% of water, 25% of sugar alcohol, 10% of grease composition, 2% of sodium caseinate, 1% of sodium stearoyl lactylate, 0.1% of sodium tripolyphosphate and 1.0% of vanillic essence. The specific preparation steps are the same as in examples 1 and 2.

Comparative example 2

The oil and fat composition comprises 90% of soybean oil-based diglyceride, 5% of glyceryl monostearate and 5% of soybean oil.

Wherein the soybean oil-based diglyceride was prepared by the preparation method described in example 1.

The coffee mate is prepared by adopting the following formula (weight percentage): 55.9% of water, 20% of sugar alcohol, 15% of grease composition, 2% of sodium caseinate, 1% of sodium stearoyl lactylate, 0.1% of sodium tripolyphosphate and 1.0% of vanillic essence. The specific preparation steps are the same as in examples 1 and 2.

Comparative example 3

The coffee mate is prepared by adopting the following formula (weight percentage): 61.9% water, 25% sugar alcohol, 10% soy oil based diglycerides (non-composition), 1% sodium caseinate, 1% sodium stearoyl lactylate, 0.1% sodium tripolyphosphate and 1.0% vanilla. Procedure for the preparation of specific coffee chaperones reference is made to example 1.

Wherein the soybean oil-based diglyceride was prepared by the preparation method described in example 1.

Comparative example 4

The oil and fat composition comprises 90% of olive oil-based diglyceride, 5% of glyceryl monostearate and 5% of soybean oil.

Wherein the olive oil-based diglyceride is prepared by the preparation method described in example 1.

The coffee mate is prepared by adopting the following formula (weight percentage): 55.9% of water, 20% of sugar alcohol, 15% of grease composition, 2% of sodium caseinate, 1% of sodium stearoyl lactylate, 0.1% of sodium tripolyphosphate and 1.0% of vanillic essence. The specific preparation steps are the same as in examples 1 and 2.

Example 3 evaluation of coffee chaperone Performance

1. Stability and low temperature solubility

(1) Water content ratio

A certain amount of the coffee mate prepared in example 1-2 and comparative example 1-3 was put in an oven at 105 ℃ and dried to constant weight. The water content is the ratio of the reduced mass to the original mass.

(2) Water activity

Preparing a sample (without processing), opening the water activity meter, and putting the sample into the water activity meter for direct detection when the instrument is stable.

(3) Low temperature solubility

Pouring the prepared coffee mate (2.5g) into 0 deg.C coffee (100mL), stirring well, centrifuging (2000rpm,2min), pouring out the layered part, measuring the mass, and calculating.

(4) Viscosity of the oil

The viscosity of the product was measured directly using a viscometer.

The above test results are summarized in the following table 1:

TABLE 1

As can be seen from the above table, example 1 is a coffee creamer prepared using a fat and oil composition (10%) including 90% of soybean-based diglycerides and olive-based diglycerides (both 1: 1) and has a final moisture content of 4.29 ± 0.05%, a water activity of 0.297 ± 0.013%, a low moisture content, little tendency to deteriorate during storage, and high stability. The low temperature solubility (0 ℃ coffee) was 95.57. + -. 0.82%, indicating better solubility.

Example 2 is a coffee creamer prepared using a fat composition (15%) comprising 90% soy oil-based diglyceride and olive oil-based diglyceride (both 1: 1) and having a final moisture content of 3.86 ± 0.04% and a water activity of 0.251 ± 0.019%, with further decrease in moisture content and further increase in product stability as the fat content increases (from 10% to 15% in example 1). The low-temperature solubility (0 ℃ coffee) is 95.72 +/-2.60%, and the increase of the oil content does not cause the reduction of the solubility.

Example 3 a coffee creamer prepared with a fat composition (15%) comprising 66% soy-and olive-oil based diglycerides (both 1: 2) with a final moisture content of 3.82 ± 0.19% and a water activity of 0.248 ± 0.014%, with little difference in product stability with a slightly increased proportion of olive-oil based diglycerides, a low temperature solubility (0 ℃ coffee) of 95.25 ± 1.44%, and a significant drop in viscosity down to 1.44 mpa.s.

Example 4 is a coffee creamer prepared with a fat composition (15%) comprising 90% soy oil-based diglyceride and olive oil-based diglyceride (both 1:5) having a final moisture content of 3.89 ± 0.08%, a water activity of 0.248 ± 0.014%, as the formulation ratio of olive oil-based diglyceride and soy oil-based diglyceride is 5: 1, the low-temperature solubility (coffee at 0 ℃) of the product is reduced to 91.54 +/-1.12%.

Comparative example 1 is a coffee creamer prepared using a fat composition (10%) comprising 95% soybean oil, having a final moisture content of 9.17 ± 0.23%, a water activity of 5.241 ± 0.097%, a higher moisture content, and a series of problems such as oxidation of fats and oils during storage. The low-temperature solubility (0 ℃ coffee) of the coffee is 53.21 +/-0.77%, and the solubility at low temperature is extremely poor, so that the coffee is not suitable for brewing low-temperature coffee.

Comparative example 2 is a coffee creamer prepared with a fat composition (15%) comprising 90% soy oil based diglycerides having a final moisture content of 4.11 ± 0.12%, a water activity of 0.421 ± 0.023%, a lower moisture content and a higher storage stability. But the low-temperature solubility (coffee at 0 ℃) is 61.11 +/-0.69%, and the solubility at low temperature is poor, so that the coffee is not suitable for preparing low-temperature coffee.

Comparative example 3 is a coffee creamer directly formulated with 10% soy oil based diglycerides with a final moisture content of 3.98 ± 0.27%, a water activity of 0.451 ± 0.031%, a lower moisture content, less tendency to deteriorate during storage, and a higher stability. The low-temperature solubility (coffee at 0 ℃) of the coffee is 63.52 +/-0.31 percent, and the low-temperature solubility is poor, so that the coffee is not suitable for brewing low-temperature coffee.

Comparative example 4 is a coffee creamer prepared using a fat composition (15%) comprising 90% olive oil based diglycerides having a final moisture content of 6.88 ± 0.39%, a water activity of 0.857 ± 0.063%, a higher moisture content, and a series of problems such as fat oxidation during storage. The low-temperature solubility (coffee at 0 ℃) of the coffee is 60.13 +/-0.84%, and the solubility at low temperature is poor, so that the coffee is not suitable for brewing low-temperature coffee.

The above studies indicate that in the preparation of the coffee chaperone, obvious differences can be generated in performance among a plurality of groups of coffee chaperones prepared by adopting oil and fat compositions with different compositions, and when the oil and fat compositions completely have no diglyceride (comparative example 1), the prepared coffee chaperone has extremely poor low-temperature solubility and is difficult to apply to the preparation of low-temperature coffee; when only one diglyceride is contained in the fat composition (comparative examples 2 to 4), the prepared coffee mate has certain improvement on low-temperature solubility and moisture content, but is still difficult to be effectively applied to the preparation of low-temperature coffee; when two kinds of diglyceride are contained in the grease composition (examples 1-4), the low-temperature solubility of the prepared coffee partner is remarkably improved, and both are more than 90%, and further comparison among examples 1, 3 and 4 shows that when the ratio of the two diglyceride, namely the soybean oil-based diglyceride and the olive oil-based diglyceride, in the grease composition is different, particularly when the ratio of the olive oil-based diglyceride in the two is larger (1: 1, 1:2 and 1:5), the low-temperature solubility of the coffee partner is reduced to some extent, but the low-temperature solubility of the coffee partner is maintained at a better low-temperature solubility level (90%); when the ratio of the soybean oil-based diglyceride in the two coffee-based coffee-making compositions is greater than that of the olive oil-based diglyceride (e.g. 1:0.6, 1:0.8), the opposite trend is shown, i.e. the greater the ratio of the olive oil-based diglyceride in the two coffee-making compositions is, the higher the low-temperature solubility of the coffee-making composition is, the better the effect is when the ratio of the soybean oil-based diglyceride in the two coffee-making compositions approaches to 1:1, and the relevant detection results are similar to those in example 4, which is not repeated herein. And when the ratio of the olive oil-based diglyceride to the soybean oil-based diglyceride is controlled to be 1:1, the prepared coffee mate has excellent low-temperature solubility and good stability.

2. Coffee partner sensory evaluation

Sensory evaluation was further conducted for examples 1 to 4 and a commercial product (Nestle coffee partner) in combination with the above-described results of the performance evaluation test. Since the coffee chaperones prepared in comparative examples 1-4 had poor low-temperature solubility, sensory evaluation was not performed.

The coffee chaperones and coffee chaperone commodities of examples 1-4 were evaluated by 30 untrained panelists using a preference test. All samples were provided in different coded cups and 9-point scores were used to assess taste, aroma, mouthfeel and overall acceptability (1 ═ dislike; 5 ═ dislike nor unpleasant; 9 ═ very favorable). Mineral water was provided to rinse the mouth after each sample attempt. The evaluation structures, after statistical analysis, are shown in table 2 below:

TABLE 2

*Data are presented as mean±standard deviation(n=30).

In combination with the above table, it can be seen from comparative examples 1, 3 and 4 that the ratio of the two diglycerides, i.e., the soybean oil-based diglyceride and the olive oil-based diglyceride, is different in the fat and oil composition, and particularly, the larger the ratio of the two diglycerides, i.e., the ratio of the two diglycerides, is (1: 1, 1:2 and 1:5), the taste of the coffee partner is somewhat reduced.

Further combining the data of the commercially available coffee partner and example 2, it was found that the sensory evaluation index scores of the coffee partner prepared in example 2 were substantially consistent with the commercial scores of the commercially available coffee partner, indicating that the coffee partner (example 2) prepared using the fat and oil composition (15%) comprising 90% of soy oil-based diglyceride and olive oil-based diglyceride (both 1: 1) had good mouthfeel similar to the commercially available coffee partner.

3. Dissolution contrast with commercial product (Nestle coffee partner)

Taking 1.0g of coffee powder (Nestle) and the same amount of each group of coffee chaperones (2.5g), adding ultrapure water (100mL) at 0 ℃ to brew 3 groups of coffee, as shown in FIG. 1-3, it can be seen that, comparing A in FIG. 1-2 with A in FIG. 3, compared with 3 cups of coffee just blended, the coffee blended with the coffee of examples 1 and 2 had partial floaters and was more than the coffee blended with the commercially available coffee chaperones, so the solubility of the coffee chaperones prepared in examples 1 and 2 was slightly lower than that of the commercially available coffee chaperones; however, when these three cups of coffee were left to stand for 5min, it was clearly observed that the coffee formulated with the commercially available chaperones produced Feathering effects (oil droplet floating phenomenon, which refers to a flaking/coagulating effect of the oil in the chaperones when they were blended into the coffee, which may be caused by acidity, temperature, type of oil, oil content and water used, or other factors), while the coffee formulated with the chaperones prepared according to the formulations of examples 1 and 2 of the present invention did not produce, thus demonstrating that the products of examples 1 and 2 of the present invention do not have any oil droplets, and have better low temperature solubility and stability.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

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