A leavening agent refers to a substance that helps dough or batter to rise and become fluffy by producing gases, like air or carbon dioxide, during baking or cooking. Full definition
For example, ammonia compounds are used as leavening agents in baked goods and as an acidity controller in cheese and sometimes chocolate. (articles.chicagotribune.com)
Because of the lack of leavening agents in Passover desserts, eggs are the go - to ingredient for my recipes. (hungryrabbit.com)
So, if you notice the lack of leavening agent aside from eggs, now you know the sad, forgetful truth. (freshplanetflavor.com)