阅读说明：本技术 一种抗冻玉米泥及其制备方法 (Anti-freezing corn paste and preparation method thereof ) 是由 齐新江 刘友刚 张丹 于 2021-09-13 设计创作，主要内容包括：本发明提供了一种抗冻玉米泥及其制备方法,所述抗冻玉米泥以玉米碴为原料,经过原料验收、粉碎、过筛、调配、蒸制、辅料添加、杀菌、包装后得到的。所述粉碎为粉碎机粉碎10～15min,所述调配为按重量百分比进行：玉米粉10％～20％、奶粉10％～20％、木糖醇2％～5％、复合抗冻剂0.1％～0.2％、辅料添加剂5％～10％、水50％～70％。所述蒸制为温度75℃～95℃,时间为10min～20min,所述辅料添加为淡奶油或黄油以及复合抗冻剂。所得到的玉米泥产品具有较高的蛋白质含量、冻藏稳定性好且口感细腻、风味香甜、质地均匀,能够应用于婴幼儿辅食。(The invention provides an anti-freezing corn paste and a preparation method thereof. The crushing is carried out for 10-15 min by a crusher, and the blending is carried out according to the following weight percentage: 10-20% of corn flour, 10-20% of milk powder, 2-5% of xylitol, 0.1-0.2% of composite antifreeze agent, 5-10% of auxiliary material additive and 50-70% of water. The steaming is carried out at the temperature of 75-95 ℃ for 10-20 min, and the auxiliary materials are light cream or butter and a composite antifreeze agent. The obtained corn paste product has high protein content, good frozen storage stability, fine and smooth taste, fragrant and sweet flavor and uniform texture, and can be applied to infant complementary food.)

1. The anti-freezing corn paste is characterized by comprising the following raw materials in percentage by mass: 10-20% of corn flour, 10-20% of milk powder, 2-5% of xylitol, 0.1-0.2% of composite antifreeze agent, 5-10% of auxiliary material additive and 50-70% of water.

2. The freeze-resistant corn puree of claim 1, wherein the composite antifreeze agent is obtained by: mixing glyceryl monostearate and sucrose fatty acid ester, and stirring.

3. The anti-freeze corn paste as claimed in claim 2, wherein the mass ratio of the glyceryl monostearate to the sucrose fatty acid ester is 3-5: 3 to 5.

4. The freeze resistant corn puree of claim 1, wherein the auxiliary material additive is selected from the group consisting of whipped cream and/or butter.

5. A process for the preparation of freeze resistant corn puree according to any of the claims 1-4, characterized in that it comprises the following steps:

s1, crushing and sieving corn grit to obtain corn flour;

s2, mixing and blending the corn flour obtained in the S1 with milk powder, xylitol and water, and steaming to obtain a prefabricated corn paste sample;

and S3, adding the composite antifreeze agent and the auxiliary material additive into the prefabricated corn paste sample obtained in the step S2, mixing, blending, stirring and mixing for 5-10 min, and sterilizing to obtain the antifreeze corn paste.

6. The method of claim 5, wherein said corn grits of S1 are selected to have a uniform particle size, full and glossy appearance, no mold, and no impurities.

7. The method according to claim 5, wherein the corn flour in S1 has a particle size of 60-100 mesh.

8. The method according to claim 5, wherein the steaming in S2 is performed at a temperature of 75 to 95 ℃ for 10 to 20 min.

9. The method according to claim 5, wherein the sterilization temperature in S3 is 121 ℃ to 135 ℃ for 8S to 15S.

10. The method according to claim 5, wherein the packaging in S3 is vacuum packaging.

Technical Field

The invention belongs to the technical field of food processing, and particularly relates to anti-freezing corn paste and a preparation method thereof.

Background

Corn, the original name maize, has second only to wheat and rice in planting area and yield, and is the third place in food crops. Corn has a high nutritional value and processing characteristics in staple food crops. Besides rich protein, carbohydrate and fat, the corn endosperm is rich in starch, vitamins and antioxidants, for example, the corn is rich in vitamin B6 and nicotinic acid, and the substances have good prevention and treatment effects on diseases such as stomach illness, enteritis, constipation and the like. The corn germ contains high fat, mineral substances and B vitamins.

Corn is generally used as a staple food or an auxiliary material for simple cooking processing, and the added value is low. With the improvement of living standard of people and the popularization of healthy living concept, the demand of deep processing of corn is more and more increased. At present, fine processing products such as corn juice, corn milk, corn can, corn paste and the like appear on the market. The corn paste is used as the infant complementary food, and the defect that the potato paste is lack of nutrition in the field of infant complementary food can be overcome due to high nutritive value and good palatability of the corn paste. In addition, the existing corn paste products in the market are mostly preserved by freezing, so that the viscosity of the products is greatly changed after long-term transportation and preservation, the sensory quality is obviously reduced, and higher requirements are provided for the frost resistance of the products.

Disclosure of Invention

In order to solve the technical problems, the invention provides anti-freezing corn paste and a preparation method thereof. The invention takes corn dregs as raw materials, and the corn dregs are processed continuously to prepare the prefabricated corn paste, and then auxiliary materials and the composite antifreeze agent are added according to the requirements, so that the fragrant and mellow flavor of the corn is ensured, the fine taste is increased, the anti-freezing characteristic is better, the shelf life is prolonged, and the requirements of complementary food for infants and the requirements of transportation and preservation are better met.

The antifreeze corn paste is prepared from the following raw materials in percentage by mass: 10-20% of corn flour, 10-20% of milk powder, 2-5% of xylitol, 0.1-0.2% of composite antifreeze agent, 5-10% of auxiliary material additive and 50-70% of water.

Further, the composite antifreeze is obtained by the following method: mixing glyceryl monostearate and sucrose fatty acid ester, and stirring.

Further, the mass ratio of the glycerin monostearate to the sucrose fatty acid ester is 3-5: 3 to 5.

Further, the auxiliary material additive is selected from butter cream and/or butter.

A preparation method of anti-freezing corn paste comprises the following steps:

s1, crushing and sieving corn grit to obtain corn flour;

s2, mixing and blending the corn flour obtained in the S1 with milk powder, xylitol and water, and steaming to obtain a prefabricated corn paste sample;

and S3, adding the composite antifreeze agent and the auxiliary material additive into the prefabricated corn paste sample obtained in the step S2, mixing and blending, stirring for 5-10 min by using a stirrer, sterilizing and packaging to obtain the antifreeze corn paste.

Furthermore, the size of the corn flour in S1 is 60-100 meshes.

Further, the steaming temperature in S2 is 75-95 ℃, and the time is 10-20 min.

Further, the sterilization temperature in S3 is 121-135 ℃ for 8-15S.

Further, the packaging is vacuum packaging.

Compared with the prior art, the technical scheme of the invention has the following advantages:

compared with the corn paste products on the market, the corn paste product has higher protein content, higher energy and higher nutritional value. Meanwhile, the crushed raw corn flour has small particle size, and the corn paste product has high gelatinization degree, so that the product has soft taste and fine granular feeling. Corn has a higher amylose content than potato, and corn puree products have better processing characteristics due to their higher viscosity. The corn paste has mellow fragrance by adding the auxiliary materials of milk powder, xylitol and unsalted butter. The composite antifreeze agent is added to delay the aging of the starch, the starch enters the starch through the hydrophobic group to form an insoluble inclusion complex, the recrystallization of the amylopectin can be indirectly inhibited through inhibiting the recrystallization of the amylose so as to achieve an anti-aging effect, the delay of the starch aging process can ensure that the product has small hardness and good sense, and simultaneously the corn paste has good storage stability and good mouthfeel and flavor sense characteristics after being frozen.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the embodiments of the present disclosure taken in conjunction with the accompanying drawings, in which

FIG. 1 is a graph of viscosity after freezing and thawing 7d of inventive examples 2, 6, 7 and comparative example 1.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

Example 1

Example 1 was prepared as follows:

(1) crushing corn dregs, sieving with a 60-mesh sieve, and collecting to obtain corn flour with uniform particle size and uniform color;

(2) the formula is as follows: 20g of corn flour, 70g of water, 20g of milk powder and 5g of xylitol;

(3) steaming the mixed sample in the step (2) for 15min at 85 ℃ by a steaming oven;

(4) adding auxiliary materials to the sample in the step (3): 8g of unsalted butter and 0.1g of composite antifreeze agent (glycerin monostearate: sucrose fatty acid ester 1:1) are mixed and blended, and are stirred for 5min by a stirrer;

(5) sterilizing at 121 ℃ for 15s, and cooling;

(6) vacuum packaging and freezing preservation.

Example 2

Example 2 was prepared as follows:

(1) crushing corn dregs, sieving the crushed corn dregs with a 80-mesh sieve, and collecting the corn powder with uniform particle size and uniform color;

(2) the formula is as follows: 20g of corn flour, 70g of water, 20g of milk powder and 5g of xylitol;

(3) steaming the mixed sample in the step (2) for 15min at 85 ℃ by a steaming oven;

(4) adding auxiliary materials to the sample in the step (3): 8g of unsalted butter and 0.1g of composite antifreeze agent (glycerin monostearate: sucrose fatty acid ester 1:1) are mixed and blended, and are stirred for 8min by a stirrer;

(5) sterilizing at 121 ℃ for 15s, and cooling;

(6) vacuum packaging and freezing preservation.

Example 3

Example 3 was prepared as follows:

(1) crushing corn dregs, sieving with a 100-mesh sieve, and collecting to obtain corn flour with uniform particle size and uniform color;

(2) the formula is as follows: 20g of corn flour, 70g of water, 20g of milk powder and 5g of xylitol;

(3) steaming the mixed sample in the step (2) for 15min at 85 ℃ by a steaming oven;

(4) adding auxiliary materials to the sample in the step (3): 8g of unsalted butter and 0.1g of composite antifreeze agent (1: 1 of glycerin monostearate and sucrose fatty acid ester) are mixed and blended, and are stirred for 10min by a stirrer;

(5) sterilizing at 121 ℃ for 15s, and cooling;

(6) vacuum packaging and freezing preservation.

Example 4

Example 4 was prepared as follows:

(1) crushing corn dregs, sieving the crushed corn dregs with a 80-mesh sieve, and collecting the corn powder with uniform particle size and uniform color;

(2) the formula is as follows: 10g of corn flour, 50g of water, 10g of milk powder and 2g of xylitol;

(3) steaming the mixed sample in the step (2) for 20min at 75 ℃ by a steaming oven;

(4) adding auxiliary materials to the sample in the step (3): 8g of unsalted butter and 0.1g of composite antifreeze agent (glycerin monostearate: sucrose fatty acid ester 1:1) are mixed and blended, and are stirred for 8min by a stirrer;

(5) sterilizing at 121 ℃ for 15s, and cooling;

(6) vacuum packaging and freezing preservation.

Example 5

Example 5 was prepared as follows:

(1) crushing corn dregs, sieving the crushed corn dregs with a 80-mesh sieve, and collecting the corn powder with uniform particle size and uniform color;

(2) the formula is as follows: 15g of corn flour, 60g of water, 15g of milk powder and 4g of xylitol;

(3) steaming the mixed sample in the step (2) for 10min at 95 ℃ by a steaming oven;

(4) adding auxiliary materials to the sample in the step (3): 8g of unsalted butter and 0.1g of composite antifreeze agent (glycerin monostearate: sucrose fatty acid ester 1:2) are mixed and blended, and are stirred for 8min by a stirrer;

(5) sterilizing at 121 ℃ for 15s, and cooling;

(6) vacuum packaging and freezing preservation.

Example 6

Example 6 was prepared as follows:

(1) crushing corn dregs, sieving the crushed corn dregs with a 80-mesh sieve, and collecting the corn powder with uniform particle size and uniform color;

(2) the formula is as follows: 20g of corn flour, 70g of water, 10g of milk powder and 4g of xylitol;

(3) steaming the mixed sample in the step (2) for 15min at 85 ℃ by a steaming oven;

(4) adding auxiliary materials to the sample in the step (3): 8g of unsalted butter and 0.2g of composite antifreeze agent (glycerin monostearate: sucrose fatty acid ester 5:3), mixing and blending, and stirring for 8min by using a stirrer;

(5) sterilizing at 121 ℃ for 15s, and cooling;

(6) vacuum packaging and freezing preservation.

Example 7

Example 7 was prepared as follows:

(1) crushing corn dregs, sieving the crushed corn dregs with a 80-mesh sieve, and collecting the corn powder with uniform particle size and uniform color;

(2) the formula is as follows: 20g of corn flour, 70g of water, 10g of milk powder and 4g of xylitol;

(3) steaming the mixed sample in the step (2) for 15min at 85 ℃ by a steaming oven;

(4) adding auxiliary materials to the sample in the step (3): 8g of unsalted butter and 0.15g of composite antifreeze agent (glycerin monostearate: sucrose fatty acid ester 3:5) are mixed and blended, and are stirred for 8min by a stirrer;

(5) sterilizing at 121 ℃ for 15s, and cooling;

(6) vacuum packaging and freezing preservation.

Example 8

Example 8 was prepared as follows:

(1) crushing corn dregs, sieving the crushed corn dregs with a 80-mesh sieve, and collecting the corn powder with uniform particle size and uniform color;

(2) the formula is as follows: 20g of corn flour, 70g of water, 10g of milk powder and 4g of xylitol;

(3) steaming the mixed sample in the step (2) for 15min at 95 ℃ by a steaming oven;

(4) adding auxiliary materials to the sample in the step (3): 8g of unsalted butter and 0.1g of composite antifreeze agent (glycerin monostearate: sucrose fatty acid ester 1:1) are mixed and blended, and are stirred for 8min by a stirrer;

(5) sterilizing at 130 deg.C for 10s, and cooling;

(6) vacuum packaging and freezing preservation.

Example 9

Example 9 was prepared as follows:

(1) crushing corn dregs, sieving the crushed corn dregs with a 80-mesh sieve, and collecting the corn powder with uniform particle size and uniform color;

(2) the formula is as follows: 20g of corn flour, 70g of water, 10g of milk powder and 4g of xylitol;

(3) steaming the mixed sample in the step (2) for 15min at 95 ℃ by a steaming oven;

(4) adding auxiliary materials to the sample in the step (3): 8g of unsalted butter and 0.1g of composite antifreeze agent (glycerin monostearate: sucrose fatty acid ester 3:5), mixing and blending, and stirring for 8min by using a stirrer;

(5) sterilizing at 135 deg.C for 8s, and cooling;

(6) vacuum packaging and freezing preservation.

Comparative example 1

Comparative example 1 is a commercially available frozen corn paste, purchased from hensche, and subjected to sensory evaluation after thawing.

Test example

Compared with the existing mashed potato and corn products, the product of the embodiment has the advantages of uniform color and texture, rich corn and milk flavors, no tooth sticking in the mouth, fine granular feeling and strong aftertaste. The previous examples were subjected to the measurement of the rheological curve after frozen storage and thawing and the sensory evaluation,

the samples of example 2, example 6 and example 7 were stored in a refrigerator at-18 ℃ for 7d, and were naturally thawed after being taken out, and naturally thawed under the same conditions as in comparative example 1, and 4 types of thawed products were measured by a rheometer and subjected to sensory evaluation. Examples 2, 6, 7 exhibit the shear thinning properties of pseudoplastic fluids. Meanwhile, the examples added with the antifreeze agent are lower than the comparative viscosity, which reflects the reduction of the starch aging effect and the stability of the sensory quality. According to the sensory evaluation result, the sensory of the product is obviously improved after the antifreeze agent is added compared with that before the antifreeze agent is added. See fig. 1 and table 1 for specific data.

TABLE 1 sensory evaluation score Table after 7d of comparative example 1 and examples 2, 6 and 7 were frozen and thawed

The basic nutritional indicators of example 2 were measured for best sensory scores and compared to a similar commercial product, comparative example 1, with the specific data shown in table 2. The protein content of example 2 is significantly higher than that of comparative example 1, the product of the present invention has high nutritional value in consideration of protein supplement and intake and energy intake, and the addition of the composite antifreeze agent makes the product freeze-storage stable, more suitable for transportation and long-term storage.

Table 3 table of essential nutrients of example 2 and comparative example 1

In conclusion, compared with mashed potatoes and the existing mashed corn, the preparation method of the anti-freezing mashed corn provided by the invention has the sensory advantages of fine and smooth taste and fragrant and sweet flavor, and meanwhile, the anti-freezing mashed corn has higher protein content and energy and high nutritional value; good freezing resistance, is suitable for transportation and storage, and has wide application prospect in food processing.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.