Baking powder usually comes in aluminum tins with plastic lids. I was ignoring this for a while since I didn’t really know what to do about it, but I’ve come up with a solution. Its really simple and its plastic free. Here’s what you need to make your own baking powder:

• 1 teaspoon baking soda
• 2 teaspoons cream of tartar (My cream of tartar has a plastic lid, but once I use it up I’m going to start buying it in bulk.)

Combine baking soda and baking powder. Use immediately. If you want to store your baking powder, add a teaspoon of cornstarch to the mix.