How To Make Baking Powder Out of Baking Soda

Step 1

Mix the baking soda and cream of tartar: Mix very thoroughly with a whisk.

Step 2

Store in an airtight container: The mixture can clump up so be sure to store in an airtight, moisture-free container. This can be stored almost indefinitely, although if it gets old use this tip to check to see if it's still active enough to bake with.