Years ago, I was at a friend’s house and I wanted to make some chocolate chip cookies. When I went digging in her pantry, I found baking powder that had expired many, many years earlier. I tossed it, ...

Baking powder is more than just a pantry staple—it’s the science behind fluffy pancakes, airy cakes, and tender biscuits. From its three core ingredients to the difference between single-acting and ...