Fluff up your baking with our aluminum-free Double-Acting Baking Powder. Free of sodium aluminum sulfate, this baking powder releases leavening carbon dioxide in two stages—first at room temperature, then in the oven—giving your baked goods a perfect rise. All-natural, non-GMO, and gluten-free, it's an essential for any kitchen. Details: All natural and non-GMO. Gluten free. Aluminum Free. Origin USA. Ingredients: mono calcium phosphate, food-grade cornstarch (non-GMO), sodium bicarbonate (baking soda) Zero-Waste Spice Refills Packaged in Compostable Packaging: Small Refill: scant 1/4 cup volume (0.85 oz net weight) Large Refill: 1/2 cup volume (2.55 oz net weight) Refill packaging is made from plants and safe for home composting. It's not meant for long-term storage; please transfer to airtight containers. Read about our zero-waste packaging here. Reusable Glass Magnetic Jars: Small Jar: scant 1/4 cup volume Large Jar: 1/2 cup volume New to Gneiss Spice? Check out our FAQs videos. Purchasing over a dozen jars? Buy a boxed custom kit and save over 10%.