Three elements of DIY homemade yogurt-yogurt machine, bacterial powder and milk.
1. Yogurt machine
The temperature of the yogurt machine should not exceed 45 degrees, and it is best to keep it at 38-42 degrees. Temperature test method of yogurt machine: add tap water into yogurt machine, and measure the temperature with thermometer after electrifying for 4 hours. When the room temperature is 32 degrees in summer, if you use an ordinary household yogurt machine, the temperature will generally exceed 45 degrees. Therefore, it is necessary to make yogurt in an air-conditioned room in hot summer. Small mushrooms are very sensitive to temperature changes. If you use an incubator with ventilation system to make yogurt, the effect is the best, but this professional biochemical instrument is very expensive and it is difficult for ordinary families to bear.
Before using the yogurt machine, the inner container of the yogurt machine must be cleaned with detergent without oil stains. After cleaning, the detergent needs to be thoroughly washed without residue. Then dry the inner side of the liner with high-quality paper towels or dry it naturally.
2. Bacterial powder
Both beneficial bacteria and freeze-dried probiotic bacteria powder are yogurt fermentation bacteria powder without any chemical additives, so the performance of baby bacteria must be different according to different conditions, which is a biological reaction. In any milk, fermented yogurt is the same bacteria, but there are chemical reactions in it.
This is not difficult to understand, just as you raise a group of chickens, the meat growth rate of ordinary rice bran feed and organic feed is definitely different. In addition, the sanitary conditions and temperature of the growing environment of chickens will also affect the growth of chickens. If the living environment is not good, chickens will get sick or even die.
The baby bacteria added by the beneficial bacteria are probiotics from Changshou village in Bulgaria. They are robust, energetic and very sensitive to environmental conditions. Just try it on inferior milk.
Beneficial bacteria and freeze-dried bacteria powder should be frozen at MINUS 65438 08 degrees. Under normal circumstances, it is light yellow, and the color of Bifidobacterium is slightly dark. It tastes sweet and sour and has a strong milk flavor.
3. Milk
Usually we make our own yogurt with sterilized bricks and pure milk. Mengniu and Yili both have this kind of aseptic brick boxed pure milk, which can be bought in ordinary supermarkets. The quality of milk is equivalent to the nutritional value of food needed for infant bacteria growth, and its sterilization degree is equivalent to the sanitary environment for infant bacteria growth. Yogurt made of milk with good conditions is fast in fermentation, firm in solidification, delicious, delicate, smooth and instant in mouth.
Of course, you can also make yogurt with milk powder. Fully dissolve 120g milk powder and water to reduce 1kg milk, boil it above 1min, then cool it to 42℃, pour in bacterial powder and stir it evenly.
It is best to completely dissolve the bacterial powder in a small clean bowl with a small amount of milk, and then pour it into the inner container of the yogurt machine and stir it evenly. Cover the lid and electrify for 12 hours, and the high-activity probiotic yogurt is ready.