To make these Sausage Pancake Muffins gluten free, replace the regular pancake mix with a certified gluten-free pancake mix. Be sure to check the labels on the sausage and shredded cheese as well, since some brands may contain additives or be processed in facilities with gluten. The rest of the recipe can remain the same. If your gluten-free pancake mix is slightly drier than a traditional one, the texture may be a bit firmer, but the muffins should still bake up well and hold together nicely.