Doritos Casserole 1 pound hamburger 1 can Cheddar cheese soup 1 can celery soup 1 can Ro-Tel tomatoes Plain Doritos, crushed Preheat oven to 350 degrees F. Brown and drain hamburger. Add Cheddar cheese soup, celery soup and tomatoes. Mix well, then pour into a baking dish, alternating layers of the soup mix and Doritos. Start with soup mix and finish with soup mix. Bake for 30 minutes.