How can I be sure King Arthur mixes are 100% gluten-free?
Our mixes, and some of our baking ingredients, are Certified Gluten-Free™ by the non-profit Gluten-Free Certification Organization (GFCO), a program of the Gluten Intolerance Group (GIG®). GFCO products are tested to be less than 10ppm (parts per million) gluten. This is stricter than even the FDA requirement of less than 20ppm gluten.