To keep this casserole gluten-free, just make sure any ingredients you buy are certified gluten-free. Most of the ingredients, like potatoes, cheese, and bacon, are naturally gluten-free but double-check the sour cream, mayo, and bacon packaging to be sure. Also, if you like to add extra toppings like croutons, go for gluten-free options. Just a few small checks and you’re all set for a gluten-free, indulgent meal!