DEAR HELOISE: I understand that baking powder has a shelf life, and that it can go bad. Can you tell me how long it remains good? — Joe and Kay, via e-mail It does have a shelf life, and here’s how to ...
Choosing between baking soda and baking powder is one of those small decisions that quietly determines whether a recipe turns out light, tender, and evenly risen, or flat, dense, and oddly bitter.