To Your Good Health...Bob Moore Thickens Soups, Sauces and Fillings Gluten Free You Can See Our Quality! Kosher All NaturalOur dense and powdery Cornstarch comes right from the endosperm of the corn kernel. It is best used as a thickening agent for puddings, pie fillings, sauces, soups and stews. Cornstarch is also popularly used in many cake and cookie recipes for producing dense and finely textured goods.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.