Flour refers to the process in which the dough is allowed to fully reproduce and produce gas under certain temperature and humidity conditions, so as to promote the dough expansion. When yeast converts starch into sugar and consumes it in the aerobic environment inside the dough, it will release carbon dioxide gas. At this time, the volume of dough will expand and rise.
Flour, also refers to fermented flour. It was discovered by accident during the development of pasta. Humans have used yeast to make dough for 5000 years.
Extended data:
Hairdressing skills:
First, choose the right starter.
1. There are three kinds of leavening agents: baking soda, flour fertilizer (old flour) and dry yeast powder. They all work on the same principle: under the right conditions, the starter produces carbon dioxide gas in the dough, and then the dough becomes soft and delicious by heating and expanding.
2. The gas released by baking soda is not rich, so the softness of the finished product made of baking soda is not very good. Moreover, it is a weakly alkaline substance, which will destroy the vitamins in flour and reduce the nutritional value of pasta. It is not recommended to choose.
3, face fat Some places are also called old noodles. It's a piece of dough left after the last fermentation. After proper preservation, it began to ferment as a strain. Flour fertilizer must be used with alkali because it will make the dough sour. But alkali will destroy the nutrition of flour, and the dosage is difficult to master, and the finished product is easy to waste, hehe ~ so it is not recommended to use it.
4. Active dry yeast (yeast powder) is a natural yeast extract, which is not only rich in nutrition, but also rich in vitamins and minerals. It is not only rich in vitamins, but also has a protective effect on vitamins in flour. Not only that, yeast can also increase the B vitamins in dough during reproduction. Therefore, the nutritional value of pasta products fermented with it is several times higher than that of unfermented pasta such as cakes and noodles.
Second, the amount of baking powder should be more or less.
Baking powder is a natural substance. Too much will not cause bad results, but will only speed up the fermentation, and perhaps even increase more nutrition. Therefore, for the novice pasta, more should not be less to ensure the success rate of dough mixing.
Thirdly, activating yeast is more important for beginners.
I don't really pay much attention to the method of adding dry yeast. Sometimes if you are lazy, you will mix the flour directly, and then add warm water and flour. But for beginners, the amount of yeast, uneven mixing and other issues will have some impact on the results of dough making. Therefore, it is suggested that novices activate yeast first: put a proper amount of yeast powder into a container and add warm water of about 30 degrees (about half of the total water consumption of dough, not too little). If you save trouble, the water will be fine. ) stir until it melts, and let it stand for 3-5 minutes before use. This is the process of activating yeast. Then pour the yeast liquid into the flour and stir well.
Fourth, the water temperature of the dough should be well controlled.
Mix the dough with warm water. The temperature is between 28 and 30 degrees. But many friends have no food at home. What should I do with a thermometer? Feel it with your hands Just don't let your hands get hot. Special note: measure the water temperature with the back of your hand. Even in summer, warm water is recommended. Of course, cold water can also be used. I just hope that the dough making process is as short as possible, which can save time.
5. The ratio of flour to water should be appropriate.
The ratio of flour to water is very important to dough. Many friends always say that it can't rise, maybe the dough is too hard. With less water and more noodles, the dough is hard, which is suitable for making handmade noodles. If there is more water and less flour, the dough will be soft when stepped on, and the finished product will taste poor. What proportion is appropriate? I'll give you a rough proportion: 500g flour, and the water addition should not be less than 250ml.
That is, the ratio is approximately equal to 2: 1. /* A novice personally proved that 2: 1 is a rice cake. Of course, whether making steamed buns or steamed buns, you can adjust the hardness of dough according to your own needs and eating habits. At the same time, we should also pay attention to the different hygroscopicity of different flours and use them flexibly.
References:
Famian- Baidu encyclopedia