Dear Barbara: I have two questions. My baking powder didn’t seem to be doing its job, so I tossed it out. How can I tell if baking powder is still good? It had not reached its expiration date. Also, I purchased new baking powder and I noticed that it said “double-acting” on the label. I don’t remember seeing that on my other baking powder, but this was a different brand. What’s the difference between baking powder and double-acting baking powder? — Liz from Lodi
Dear Liz: One way to check if your baking powder is still good is to take a glass of room temperature water and add a teaspoon of the baking powder to it. It should fizz, which is an indication that it is still good.