Can expired baking powder make you sick in a recipe?

It's unlikely that expired baking powder will make you sick in a recipe.

Here's why:

* Baking powder is primarily a leavening agent. It's not designed to be a food source, so it doesn't contain harmful bacteria or toxins that would cause illness.

* Expired baking powder loses its leavening power. This means it won't rise your baked goods as effectively, but it won't make you sick.

* The "expiration date" is more about potency than safety. Baking powder still has some leavening power even after the "best by" date.

However, using expired baking powder can affect the texture and taste of your baked goods:

* Flattened cakes and cookies: The lack of rising action will result in dense, flat baked goods.

* A slightly sour or metallic taste: As baking powder degrades, it can release a slightly sour or metallic flavor.

To be safe, always check the expiration date on your baking powder and use fresh ingredients whenever possible.

If you're unsure about the freshness of your baking powder, you can always test it. Simply mix a teaspoon of baking powder with a tablespoon of hot water. If it fizzes, it's still good. If not, it's time to replace it.