Baking powder is a kind of compound leavening agent, which is a white powder made of baking soda powder as raw material, acid substances and corn flour as fillers, also known as foaming powder and baking powder. Baking powder is a rapid starter, which is mainly used for the rapid fermentation of cereal products. When making cakes, cakes, steamed bread, steamed bread, shortbread, bread and other foods, the dosage is large.
Classification of foaming powder
1, baking soda (sodium bicarbonate): Under the action of acidic substances contained in food, baking soda can be decomposed into sodium ions, water and carbon dioxide gas, which can play the role of fluffy food. However, the reaction of baking soda releasing gas needs the existence of acidic substances and can be completed in a short time. The initiation of the reaction is difficult to control, and excessive dosage will produce bitter or astringent taste. For these reasons, baking soda is rarely used as a filler alone, but is usually used as one of the components of composite fillers.
2. Odor powder (ammonium bicarbonate): Odor powder is generally used when a large amount of gas needs to be generated quickly. The odorous powder will decompose into water, ammonia and carbon dioxide gas under heating or acidic conditions. Due to the rapid release, there is little ammonia residue in the finished product, so there will be no smell of ammonia in the finished product. Because smelly powder is easy to decompose and release ammonia gas, it loses its function and is difficult to preserve, so it is rarely used in general families. Use stinky powder when baking peach cakes or some biscuits.
3. Alum (aluminum potassium sulfate or aluminum potassium sulfate, S.A.S): The commonly used alum is actually an acidic mixture. When it reacts with the inherent or added ingredients of food, such as baking soda, it will release gas and play a fluffy role. Generally, it is also used as an acidic component of composite expansive agent. It is characterized by rapid reaction at high temperature. A common example is fried fritters.
4. Baking powder: it is a kind of compound swelling agent with many kinds. Generally solid alkali is mixed with acid powder. Under dry conditions, they do not contact or react. Once they meet water, they will dissolve and contact, and the reaction will release gas. Baking soda is commonly used in solid alkali powder, and tartar and phosphate (such as calcium phosphate and sodium pyrophosphate) are used in solid acid powder, and their reaction speed is very fast.