阅读说明：本技术 一种蓝莓饼干及其制备方法 (Blueberry biscuit and preparation method thereof ) 是由 伍文奇 付佳 许海燕 赵承伟 王小琼 陈尽染 周潮辉 于 2020-05-22 设计创作，主要内容包括：本发明公开了一种蓝莓饼干,包括以下重量份原料：蓝莓粉15份,面粉200份,白砂糖35份,黄油30份,奶粉20份,食盐0.1份,碳酸氢钠2.5份,鸡蛋适量,纯净水适量。本发明的蓝莓饼干,蓝莓含量高、成分不繁杂、质量可控,具有更加显著的保护视力、增强免疫力等多重功效。基于以上,本发明的蓝莓饼干具有广阔的市场前景。(The invention discloses a blueberry biscuit which comprises the following raw materials in parts by weight: 15 parts of blueberry powder, 200 parts of flour, 35 parts of white granulated sugar, 30 parts of butter, 20 parts of milk powder, 0.1 part of salt, 2.5 parts of sodium bicarbonate, a proper amount of eggs and a proper amount of purified water. The blueberry biscuit disclosed by the invention has the advantages of high blueberry content, no complex ingredients and controllable quality, and has multiple effects of protecting eyesight, enhancing immunity and the like. Based on the above, the blueberry biscuit has a wide market prospect.)

1. The blueberry biscuit is characterized by comprising the following raw materials in parts by weight: 10-20 parts of blueberry powder, 180 parts of flour, 220 parts of sugar, 25-35 parts of fat and 0.03-0.09 part of salt.

2. The blueberry biscuit of claim 1, wherein the sugar is selected from one or more of glucose, fructose, galactose, mannose, sucrose, lactose and maltose.

3. The blueberry biscuit of claim 1, comprising less than 20 wt% of sucrose, preferably 5 to 15 wt% of sucrose, most preferably 11.7 wt% of sucrose, relative to the total weight of the blueberry biscuit.

4. The blueberry biscuit of claim 1, wherein the fat is selected from one or more of liquid oil and solid fat;

the liquid oil comprises palm oil, coconut oil, rapeseed oil, corn oil, sunflower oil and soybean oil;

the solid fat comprises butter, lard, beef tallow and fish oil.

5. The blueberry biscuit of claim 4 wherein the fat is selected from the group consisting of sunflower oil and butter.

6. The blueberry biscuit of claim 1 comprising less than 30mg of salt per 100g of blueberry biscuit finished product.

7. The blueberry biscuit of claim 1, wherein the raw material further comprises other ingredients;

other components are one or more of milk, eggs, fruit pieces, nuts, vitamin C, essence, colorant and leavening agent;

the leavening agent comprises one or more of ammonium bicarbonate, sodium bicarbonate and sodium pyrophosphate.

8. The blueberry biscuit of claim 1, wherein the blueberry powder is obtained by a freeze-drying process, comprising the following steps:

(1) removing rotten, mildew, scab, immature and over-mature berries from fresh blueberries, and cleaning;

(2) pre-freezing: pre-freezing the berries at the temperature of-15 to-25 ℃ for 24 to 36 hours;

(3) vacuum freeze-drying: the vacuum freeze-drying temperature is-40 to-50 ℃, and the vacuum degree is as follows: 0.01-0.03 MPa for 72-84 h;

(4) crushing: and (4) crushing the freeze-dried blueberries into powder to obtain the blueberry powder.

9. A preparation method of the blueberry-flavored biscuit as claimed in any one of claims 1 to 8, characterized by comprising the following steps:

(1) taking butter, standing at room temperature for softening, adding white sugar, stirring, and foaming to white;

(2) pouring eggs into butter in several times, and stirring once every time;

(3) adding blueberry powder, milk powder and flour, and stirring;

(4) kneading into a column with square cross section, placing into a refrigerator freezing chamber, and freezing for 30 min;

(5) and (3) cutting the dough into 5mm slices by a knife when the dough is slightly hard, putting the slices into an oven, and baking the slices for 15min at 180 ℃ to obtain the blueberry biscuit.

Technical Field

The invention belongs to the technical field of food processing, and particularly relates to a blueberry biscuit and a preparation method thereof.

Background

Blueberry (blueberry), bilberry, belonging to the Ericaceae family, Vaccinium genus. The fruit contains abundant nutritional components such as vitamin C, flavone, and anthocyanidin, and has effects of preventing cranial nerve aging, tonifying heart, resisting cancer, softening blood vessel, and enhancing immunity. The North American wild blueberry has a severe growth environment, gives incomparable nutrient components to the common blueberry, and is an excellent source of manganese which has great significance on skeletal development. Therefore, the health care product has more remarkable health care effects of activating retina, strengthening eyesight, preventing eyestrain, enhancing immunity, delaying senility, increasing bones and the like. Therefore, the blueberry is used as the raw material to prepare the nutritional product, and the nutritional product has extremely wide market prospect.

The biscuits are convenient to eat and carry as snacks or added diet, have wide audience groups, can be called as nutritional good products suitable for people of all ages, can supplement energy required by human bodies besides good taste, and become an indispensable food in daily life, so that the cold-resistant, strong-oxidation-resistant and non-storage 'berry king' of the wild blueberries in North America is processed into powder by a freeze drying technology to prepare biscuit products with unique flavor, high acceptability and stable property, and the biscuit products have the values of preventing and treating osteoporosis, protecting eyesight and the like so as to meet the increasing health care requirements of people.

At present, the types of biscuits are various and increasingly increased in the market, but blueberry biscuits are few, and the requirements of most people on the taste of the biscuits are different, so that nutritional and healthy blueberry biscuits need to be developed to meet the requirements of the public on health.

Disclosure of Invention

The invention aims to provide a blueberry powder freeze-drying process, wherein North American blueberry powder is processed into dry powder through a freeze-drying technology, so that the volume of the dry powder is reduced, the transportation performance is improved, the color, the fragrance and the taste of blueberries and the loss of various aromatic substances can be reduced to the maximum extent, various levels of nutritional ingredients in the blueberries are reserved, the storage time is prolonged, and the content of the blueberries in the product can be improved.

The second purpose of the invention is to provide a biscuit prepared from wild blueberries in North America, the preparation method is simple, and the obtained product is a biscuit food which contains higher content of blueberry anthocyanin and has more remarkable multiple effects of bone increasing, eyesight protection, organism immunity enhancement and the like.

The invention also aims to provide a preparation method of the blueberry biscuit, which only contains one effective component of blueberry powder, has a simple formula, avoids compatibility reaction caused by complex components, has single component in taste, can show the special flavor of blueberries, and can measure and control the effective component.

In order to achieve the purpose, the technical scheme provided by the invention is as follows: a blueberry biscuit comprises the following raw materials: 10-20 parts of blueberry powder, 180 parts of flour, 220 parts of sugar, 25-35 parts of fat, 0.03-0.09 part of salt and other components.

Preferably, the blueberry biscuit is prepared from the following raw materials in parts by weight: 15 parts of blueberry powder, 200 parts of flour, 35 parts of white granulated sugar, 30 parts of butter, 20 parts of milk powder, 0.06 part of salt, 2 eggs and a proper amount of purified water.

The North American wild blueberry powder adopted by the invention is obtained by a freeze drying process, and specifically comprises the following steps:

1) removing rotten, mildew, scab, immature and over-mature berries from fresh blueberries, and cleaning;

2) pre-freezing: pre-freezing the berries at-20 deg.C for 24 hr;

3) freeze-drying: the vacuum freeze-drying temperature is-40 ℃, and the vacuum degree is as follows: 0.025MPa for 72 h;

4) crushing: and (4) crushing the freeze-dried blueberries into powder to obtain the blueberry powder.

The particle size influences the absorption of substances, and the blueberry powder prepared by the freeze-drying process is small in particle size and fine and smooth in powder quality, is beneficial to promoting the absorption of nutrient substances, and plays the health-care effect of the blueberries to the greatest extent.

The method for preparing the blueberry flavored biscuits by using the blueberry powder comprises the following steps:

1) taking 30 parts of butter, standing at room temperature for softening, adding 35 parts of white granulated sugar, stirring uniformly, and foaming until the white granulated sugar turns white;

2) taking a proper amount of eggs, pouring the eggs into the butter in several times, and stirring once every time;

3) adding 15 parts of blueberry powder, 20 parts of milk powder and 200 parts of flour; stirring uniformly;

4) kneading into a column with square cross section, placing into a refrigerator freezing chamber, and freezing for 30 min;

5) and (3) cutting the dough into 5mm slices by a knife when the dough is slightly hard, putting the slices into an oven, and baking the slices for 15min at 180 ℃ to obtain the blueberry biscuit.

The biscuit prepared by the invention adopts freeze-dried blueberry powder as a raw material, has extremely high content of nutrient components compared with fresh blueberry fruits with the same weight, is not added with various additives, has good taste, high acceptance, rich nutrition and stable property, and can play health care roles of increasing bone density, protecting eyesight and the like after being eaten for a long time.

The blueberry compound health care biscuit is different from some compound health care biscuits with various components on the market, the effective components are difficult to measure and control, only the blueberry is a raw material with high nutritional value, and the blueberry compound health care biscuit has the effects of increasing bones, protecting eyes, enhancing eyesight, enhancing autoimmunity and the like and is also guaranteed in the quality control aspect.

Detailed Description

The preparation method of the blueberry powder used in the embodiment of the invention is as follows:

1) removing rotten, mildew, scab, immature and over-mature berries from fresh blueberries, and cleaning;

2) pre-freezing: pre-freezing the berries at-20 deg.C for 24 hr;

3) freeze-drying: the vacuum freeze-drying temperature is-40 ℃, and the vacuum degree is as follows: 0.025MPa for 72 h;

4) crushing: and (3) crushing the freeze-dried blueberries into powder, and sieving the powder with a 400-mesh sieve to obtain the blueberry powder.