Gluten free., Certified Gluten-free. Non GMO Project verified. nongmoproject.org. A taste of France, by way of Wisconsin. Est. 1897. Enjoyed everywhere. This is the culmination of 120 years worth of fine mustard-making tradition. Inside is over a century of experience, the finest ingredients, generations of expertise and, of course, really really good mustard. This is bold at its best. koopsmustard.com. Made in Wisconsin., Product of USA.