Baking powder is one of this places you do not expect corn. But, alas, it is there. Both cream of tartar and baking soda easily clump, having a bit of corn starch in there helps it not to clump up.
When subbing out baking powder with corn, there area few options. If you can find it, I am sure there is baking powder out there without corn. I have not seen it, but am sure it exists. You can also just divide the amount of baking powder you use into four parts, do one part baking soda and two parts cream of tartar. No need to add the starch in that case.
But, perhaps the easiest is to just make some yourself. You just need to mix 2 parts cream of tartar, with 1 part baking soda, and 1 part starch of choice (tapioca, arrowroot, organic potato or even organic corn starch).
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- Sift everything together. I like to store mine in a one cup mason jar.
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