Did you know Baking Powder (Baking Soda is aluminum free ) contains aluminum unless otherwise stated on the container it is sold in? This is what gives some baked goods a tinny taste.
“One of the least expensive, and most effective, things you can do to improve the taste of your cakes, quick breads, cookies, and muffins is to switch to aluminum-free baking powder right away.” ~ David Lebovitz
Why You Should Use Aluminum-Free Baking Powder by David Lebovitz is an informative article on avoiding aluminum in baking powder.
Aluminum is toxic in food. Aluminum can be absorbed through the skin through deodorants and lotions.
A substitute for baking powder can be made by combining these easily available ingredients:
1/2 teaspoon cream of tartar
1/4 teaspoon of baking soda
1/4 teaspoon cornstarch.