So, what exactly is baking powder, and how does it work its magic? It's a mixture of baking soda and an acid (usually cream of tartar) that's designed to release gas and make your baked goods rise. The key is to use it before the expiration date, when it's still fresh and potent - but even then, there's a bit of wiggle room.
Now, we know what you're thinking: "But will it still work if it's expired?" The answer is, maybe - it's not a guarantee, but it's worth a shot if you're feeling adventurous. Just be sure to test it first by mixing a small amount with water to see if it fizzes and bubbles. If it does, you're good to go - if not, it's time to invest in a fresh canister.
