To make this Crispy French Fried Onions Casserole gluten-free. Start by substituting the egg noodles. With your favorite gluten-free pasta. Many brands offer excellent gluten-free options. That will work just as well. Additionally, ensure that both the French onion dip. And the condensed cream of mushroom soup. Are certified gluten-free. As these products often contain hidden gluten. For the crispy topping. You can either purchase gluten-free fried onions (which are available. At most grocery stores). Or make your own. Using gluten-free flour. With these easy swaps. You can enjoy all the deliciousness of this casserole. Without the gluten!