01 -
Preheat oven to 400º F and lightly grease a 9x13-inch baking dish with non-stick spray.
02 -
In a large bowl, beat eggs and milk together until combined. Stir in biscuit mix, and add kosher salt and freshly ground pepper, if desired. Set aside.
03 -
Season ground beef with salt and pepper, then cook in a skillet over medium heat until browned. Drain excess fat and stir in taco seasoning.
04 -
Place cooked beef in an even layer in the greased baking dish. Spread the prepared biscuit mix in an even layer on top of the beef.
05 -
Transfer the baking dish to the oven and bake for 22-25 minutes, or until the biscuit layer is golden brown.
06 -
Remove the casserole from the oven and let it cool for 10 minutes. Spread the sour cream evenly on top of the biscuit layer.
07 -
Top with chopped lettuce, tomatoes, and olives, if using. Sprinkle grated sharp cheddar cheese on top.
08 -
Serve the taco casserole hot and enjoy!