Baking powder actually refers to baking powder, which is sold in big supermarkets.

Its fermentation principle is that soda, baking soda and solid acidic substances undergo chemical changes in the process of dough mixing to produce carbon dioxide, which plays a role in dough mixing;

However, it should be noted that it is different from yeast: yeast activates and revives yeast by adding water or heating in the process of dough mixing, thus fermenting sugar in flour to produce carbon dioxide. Therefore, the two are completely different.