To Your Good Health... Bob Moore Friend of The Heart Stone Ground Gluten Free Certified By QAI Kosher Bob's Red Mill Brown Rice Flour is carefully ground on cool and slow turning, century-old stone-buhr millstones. We use only the highest quality whole grain brown rice to produce a delicious flour with a mild, nutty flavor. Our wholesome Brown Rice Flour is a favorite ingredient for gluten-free baking. It's also great as breading or for thickening soups, sauces and gravies. Bob's Red Mill products labeled Gluten Free are batch tested in our quality control laboratory. We use an Elisa Gluten Assay test to determine if a product is gluten free.