Gather your ingredients and preheat your oven to '350. Brown the hamburger using a deep skillet on stovetop. Drain. Turn off stovetop. Mix the enchilada sauce and cream of mushroom and pour over hamburger. Stir until mixed well. Let the mixture stand while you layer the bottom of a 9 x 9 inch glass baking dish with the Doritos. Alternating the mixture, shredded cheese and the Doritos until gone. Top off with any extra cheese left. Place in oven and heat until cheese melted. Enjoy!