How To Make Your Own Baking Powder

One of my bizarre "make-it-myself" items is baking powder.

I say bizarre because it may sound like a futile act. What value is there in mixing up baking powder?

I've heard that making your own baking powder is cheaper than buying aluminum-free baking powder, but I've never figured it out myself.

I started mixing up my own baking powder when I was given a large container of cream of tartar and didn't know what to do with it.

That container of cream of tartar is used up now but I continue to mix up my own baking powder. I like that I can mix up as small or large as amount as I wish so that my baking powder always stays fresh. I buy cream of tartar at my bulk food store. I keep a slip of paper with the ratio in the cream of tartar container so that I can mix up a new batch in minutes.

The ratio for baking powder is -

1 baking soda to 1 cornstarch to 2 cream of tarter

Mix together whatever amount you wish. You can use teaspoons, tablespoons, or cups. Mix well and seal in air tight container. I use an old baking powder container for ease of measuring.

What is the most bizarre item that you make yourself?