baking powder means: It is a leavening agent that contains baking soda, one or more acids, such as tartaric or citric. When it is wet, and hot, it reacts with the acid in all other ingredients. Because it contains two kinds of acid, the baking powder at home has “double-acting”. One reacts to liquids in the bowl while the other reacts during baking. The gas that is produced to “lift” the batter, and make it light at the end, is carbon dioxide. Mix one tablespoon of baking powder and 14 cups very hot water to test for strength. The mixture should explode. (in Cooking Dictionary)

What else does baking powder mean?

  • Chemical leavener that combines an acid and bicarbonate soda. This gas allows baked goods to rise. Carbon dioxide is formed when the acid reacts with the soda to make the baking powder. Double-acting baking powder, also known as the “double acting” variety, is most popular. It produces gas when it’s mixed and then again at very high temperatures. This should be kept tightly sealed. (in Cooking Dictionary)
  • This is a leavening agent that contains a mixture of baking soda and an acid-like cream of tartar, as well as a moisture-absorber such cornstarch. It releases carbon dioxide gas when mixed with liquid. This causes baked goods rise. (in Cooking Dictionary)
  • Mixture of starch and baking soda. It releases carbon dioxide from a mixture with liquids like milk or water. (in Merlin Dictionary)