Simply put, yeast is actually a microorganism. The principle is to decompose the sugar in raw materials, and then produce carbon dioxide, which makes the embryo expand. Compared with baking powder, it has stronger expansion ability and can make the finished product softer. Relatively speaking, decomposition takes time. Usually used to make bread, steamed buns and steamed buns at home. Only yeast has strict requirements on temperature, humidity and dough hardness, but with the development of the network, more and more people have mastered its use.
If it is simply the speed of hair, the baking powder is fast and is not affected by temperature and humidity; But it contains chemicals and is harmful. Yeast is healthy and safe, and the start-up effect is good; Only for a long time, affected by temperature and humidity. When baking powder comes into contact with moisture, it will produce a lot of carbon dioxide quickly. The activity of yeast is greatly influenced by temperature. Therefore, warm water is needed for yeast fermentation, and gaps need to be left in the dough during fermentation to promote yeast fermentation. Compared with yeast, baking powder can make dough faster, depending on what kind of cake you want to make. If the steamed bread wants to make dough faster and the yeast is too slow, mix it with baking powder, which is generally used in steamed bread shops and steamed bun shops outside. Baking powder is generally used for baking food, such as cakes, bread, biscuits and so on. For example, to make a cake, you don't need to ferment like bread and steamed bread, but you can get a fluffy and soft taste by sending protein and mixing low-gluten flour.