HOW TO TEST YOUR BAKING SODA AND BAKING POWDER
Here, you will learn how to test your baking soda and baking powder for freshness. It's easy and it will make sure your bakes rise.
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To test baking soda, combine a small amount with vinegar, lemon juice, or some other acid to see a reaction.
To test baking powder, combine a small amount with water to see a reaction.