baking powder, which is a white powder with baking soda powder and other acidic materials and corn flour as filler. Baking powder reacts when it is in COntact with water, and acidic and alkaline powders are dissolved in water at the same time, and some of them will start to release carbon dioxide (co? ), at the same time, in the process of baking and heating, more gas will be released, which will make the product expand and soft. According to the different reaction speed, baking powder can also be divided into slow reaction baking powder, fast reaction baking powder and double reaction baking powder. The quick-reaction baking powder starts to work when it is dissolved in water, while the slow-reaction baking powder starts to work during baking and heating. Among them, the "double-reaction baking powder" has the reaction characteristics of both fast and slow baking powders. Generally, the baking powder purchased in the market is "double reaction baking powder".

soda and baking powder are two different things from yeast powder.