so I checked in with a baking and pastry expert on how you can test your baking powder to see if it’s fresh. “When properly stored, the shelf life of baking powder is actually indefinite ...

Read More: Baking Soda vs. Baking Powder: A Pastry Chef Explains the Difference To test baking soda for freshness: Add about 1/4 teaspoon of baking soda to a bowl Add a couple of tablespoons of ...