How to test if your baking soda or baking powder are still good

  The easiest way to test baking soda to see if it is still good for leavening is to put some in a small bowl and add a little vinegar to it. (Make your own baking soda volcano!) If it bubbles up, it’s still good.

The easiest way to test baking powder to see if it still works is to put some in a small bowl and add some water to it. If it foams up, it’s still good.

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