Baking Soda. 

Bob's Red Mill Premium Quality Gluten Free Baking Soda is made from the deposits of mineralized sodium bicarbonate. Baking Soda is plain bicarbonate of soda, a top quality leavening agent, used in combination with acidic ingredients for baking. It is extracted by a simple water process that uses no chemicals. And like all of their gluten free products, it is produced in their 100% gluten free facility and subject to ELISA batch testing to ensure its purity. When using baking soda in combination with acidic ingredients, such as buttermilk, molasses, cocoa or yogurt, it releases carbon dioxide that causes the batter or dough to rise. It's also a great household cleanser and odor absorber. See the back of our package for some great tips for using our baking soda for kitchen deodorizing and even brushing your teeth! Our package also features a terrific recipe for Buttermilk Biscuits.