Can expired baking soda still be used for baking?

Expired baking soda can still be used for baking, but its effectiveness will be reduced. Here's why:

* Baking soda's main function: Baking soda (sodium bicarbonate) is a chemical leavening agent. It reacts with acidic ingredients in the recipe to produce carbon dioxide gas, which creates the air pockets that make baked goods rise.

* What happens when it expires: Baking soda doesn't really "expire" in the sense that it becomes dangerous. It simply loses some of its potency over time as it absorbs moisture and carbon dioxide from the air. This means it won't react as strongly with acids, resulting in less leavening power.

* How to test if it's still good: You can test your baking soda by mixing a tablespoon with a tablespoon of vinegar. If it fizzes vigorously, it's still good. If there's little to no reaction, it's time to replace it.

Here's what you can do if your baking soda is expired:

* Use more: If the fizzing test is weak, try adding a little extra baking soda to your recipe.

* Use fresh baking soda: If you're making a recipe that relies heavily on leavening, it's best to use fresh baking soda for optimal results.

* Don't use it for other purposes: Expired baking soda is still safe for other uses, such as cleaning or deodorizing, but it may not be as effective.

In conclusion, while expired baking soda won't harm you, it may not leaven your baked goods as well as fresh baking soda. It's always a good idea to test it before using it for baking.