Baking powder, also known as compound puffing agent, foaming powder, baking powder, is mainly used for the rapid production of products such as cakes, breads, cookies, peach shortcake and buns. Baking powder is usually divided into two kinds, one is aluminum-containing baking powder and the other is aluminum-free baking powder.

Sweet baking powder, doughnut essence, etc. belongs to the aluminum-containing baking powder, mainly containing aluminum potassium sulfate or aluminum ammonium sulfate components; non-aluminum baking powder does not contain any aluminum components, the general use of the amount of 2% -5%, heat decomposition products are basically harmless to the human body, compared with the traditional baking powder, the price is relatively high.