Preheat Oven
Preheat your oven to 350°F (175°C).

1. Prepare the Meat Mixture
   In a large pan over medium heat, cook the ground beef until fully browned. Drain excess fat. If using, stir in the taco seasoning.
2. Create the Cheese Sauce
   To the pan with beef, add the cheddar cheese soup, cream of chicken soup, evaporated milk, and diced green chilies. Stir everything together and continue to cook over medium heat until the mixture becomes hot and bubbly.
3. Layer the Casserole – First Half
   Lightly spray a 9×13-inch baking dish with non-stick spray.
   Spread half of the Doritos (lightly crumbled—not too small) across the bottom.
   Scoop half of the meat and cheese mixture over the chips.
   Sprinkle 1 cup (or more as desired) of shredded Mexican cheese over the meat.
4. Layer the Casserole – Second Half
   Add another layer using the remaining Doritos (again, lightly crushed), the rest of the meat mixture, and top with the remaining cheese.
5. Bake
   Place the casserole in the oven and bake for about 20 minutes or until the cheese is melted and the dish is heated through.
6. Serve with Toppings
   Once out of the oven, garnish with your favorite toppings such as sour cream, diced green onions, cherry tomatoes, avocado, or salsa.