Make your own aluminum free baking powder

In the article Hidden Aluminum in Your Diet - Baking Powder By Linda Pogue you can find this recipe for making your own aluminum free baking powder.

Homemade Baking Powder
1/4 cup baking soda
1/2 cup cream of tartar
1/4 cup corn starch
Mix all ingredients together until well combined. Store in an airtight container. When using this product, bake immediately after mixing up the recipe batter. Yield: One cup of baking powder.