To make these Homemade Sausage Cheddar Biscuits gluten free, replace the all-purpose flour with a gluten-free 1:1 baking flour blend that is designed for biscuit or pastry recipes. For the best texture, use a blend that already contains xanthan gum, or add xanthan gum according to the package directions if needed. Also make sure the breakfast sausage, baking powder, baking soda, shredded cheddar, buttermilk, and any parchment paper or cooking sprays used are certified gluten free or free from gluten-containing additives. If you are baking for someone with celiac disease or a strong gluten intolerance, use thoroughly cleaned bowls, utensils, baking sheets, and work surfaces to avoid cross-contact.