As an all-phosphate baking powder, Rumford Baking Powder does not contain any aluminum. This property makes it somewhat faster acting than typical double-acting baking powders. You’ll still see a boost of leavening in the oven, but most of the reaction occurs in the mixing bowl. While this makes a more delicate crumb structure in the finished product, do not dawdle. You’ve got to work quickly for best results. Ingredient: Calcium Acid Phosphate, Bicarbonate of Soda, Cornstarch (from NON-GMO corn) * Aluminum free * Double acting * Gluten free * Zero Trans Fat * Kosher: Pareve