Flat, dense cookies? Not a chance. Fact checked by Marcus Reeves Looking for some substitutes for baking powder? Baking powder is one of those ingredients that you might take for granted in your ...

In fact, I learned the hard way about best-use-by-dates when we tried baking a cake with an old can of baking powder. I’ll bet you can guess what happened — we ended up with a flat cake.

Baking soda and baking powder are very different ingredients that can't be swapped, but if you have run out of your leavening ...