While staying at my grandparents’ house last weekend, I was craving pancakes—until I opened the baking cupboard and found a jar of baking soda with a label from the early 2000s. Could it still work?

Baking Soda Baking soda does eventually expire, but may still be good past the expiration date. The flavor isn't an issue, as that's not why we use it in our baking in the first place. Instead, its ...