Aluminum in foods and cookware have been associated with Alzheimers and other neurological disorders. Commercial baking powder contains alum, so to make your own alum-free powder, combine the following ingredients well and store in a jar.
While you're at it, feel free to throw out your commercial baking powder and aluminum pots and pans! :~)
1/4 cup baking soda
1/2 cup cream of tartar
1/2 cup arrowroot powder