01 -
Cook ground beef in a large skillet over medium heat, breaking it up with a spoon. Continue until fully browned and juices mostly evaporate, about 7 minutes.
02 -
Add taco seasoning, diced tomatoes with green chilies, condensed cheddar cheese soup, and milk to the skillet. Stir well, reduce heat, and simmer gently for 5 minutes to blend flavors and thicken sauce.
03 -
Lightly grease a 9x13 inch baking dish. Spread half of the crushed Doritos evenly on the bottom to create a crunchy base.
04 -
Spoon the beef mixture over the Doritos base and spread into an even layer with a spatula.
05 -
Sprinkle remaining crushed Doritos and shredded cheddar cheese evenly on top. Bake in a preheated oven at 350°F (175°C) for 15-20 minutes until cheese bubbles and browns lightly.
06 -
Allow casserole to rest for 5 minutes after baking to set layers for easier serving.