Features: It is composed of alkaline baking soda powder, acidic substances (such as tartar powder, aluminum salt) and filler (corn flour). It contains both acid and alkali, so it can form a chemical reaction without adding acidic substance, it cause production of carbon dioxide, and expands the batter.
Mainly added to baked products such as huat kueh, cakes, pao, mantou, shortbread, bread, etc. to make rapid fermentation and expansion.
1 teaspoon baking powder = 1/4 teaspoon baking soda + 1/2 teaspoon cream of tartar powder/vinegar/lemon juice
The gas production capacity of expired baking powder will be weakened. It can be tested before use to ensure that there is no failure. Mix a teaspoon of baking powder into ¼ cup of hot water, if a large amount of bubbling starts immediately, it means the baking powder is still good.