When your pancakes come out too flat or your cake doesn't rise, your leavener might have lost its oomph. Here's how to do a ...

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 ...

Claire is Lifehacker's Senior Food Editor. She has a B.S. in chemistry, a decade of food journalism experience, and a deep love for mayonnaise and MSG. At any given moment, I have at least one open ...

Have you ever looked at a half-used tin of baking powder or cocoa and wondered, “Is this still okay to use?” You’re not the only one. Most of us dislike throwing away perfectly good ingredients. The ...