Bob's Red Mill Gluten Free Arrowroot Starch Flour, 16 oz is grain-free and can be used as a direct substitute for cornstarch, making it a great option for those with corn allergies. Since it does not have flavor of its own, it is perfect for gluten free baking and for thickening sauces, soups, stews, and more. Arrowroot also has many great health benefits. It helps to promote digestion and sleep and improve circulation.