Mustard, Yellow, Ground Certified Gluten Free, crafted in San Francisco using the finest ingredients since 1986. Morton and Bassett Ground Mustard adds a tangy heat to marinades, soups and can be a secret ingredient in a macaroni and cheese recipe. Morton and Bassett Ground Mustard is a versatile ingredient and pantry staple. Gluten free. Non-gmo. Non-irradiated. All natural. Salt free. No msg. No preservatives.