Get a FREE Coupon for Betty Crocker Gluten-Free Dessert Mix You must call in for this one, but it took about 2 minutes: Call General Mills Consumer Services number: 1(800) 446-1898. At the main menu, hit #4 or say “four.” This will take you to a customer representative. Tell the representative that you are interested in the free gluten-free baking coupons. He/she will ask a few questions: Zip code, whether your household did not limit gluten ingestion, limited gluten or was gluten-fre