The Simple Addition To Turn Baking Soda Into Baking Powder
By JENNIFER SWEENIE
The main difference between baking soda and powder is that baking powder contains acid, while baking soda has none. Therefore, acid is the key to turning baking soda into powder.
Cream of tartar, also known as potassium bitartrate, is the perfect acidic ingredient to activate baking soda and turn it into a baking powder substitute.
Cream of tartar is also good to have on hand for stabilizing ingredients like whipped egg whites. It can even keep vegetables bright in color after they've been preserved.