This smooth keto cheeseburger casserole is hearty and filling and makes a amazing low carb opportunity to a cheeseburger. You received’t leave out the bun!

This casserole is a amazing option if you follow a keto or a low carb weight loss plan. You get all of the awesome flavors of a cheeseburger, with out the soggy, spongy bun.


I absolutely like casseroles. They’re simply so easy. You vicinity some components inside the casserole dish, vicinity it within the oven, and 30-60 mins later, dinner is prepared!

In case you’d like to show this keto cheeseburger casserole right into a whole meal, you can add 1-2 cups of raw riced cauliflower to the meat and onion and prepare dinner the entirety collectively. you may need to growth the olive oil a little in case you do.



  • Olive oil spray for the baking dish
  • 2 tablespoons olive oil
  • 2 lb. extra lean ground beef
  • 1 medium onion, finely chopped (6 oz)
  • 2 teaspoons coarse kosher salt (not fine salt)
  • 1/4 teaspoon black pepper
  • 1 tablespoon minced garlic
  • 1/4 cup avocado oil mayonnaise
  • 1/4 cup unsweetened ketchup
  • 1 tablepsoon mustard
  • 1 1/2 cup shredded sharp cheddar, divided (6 oz)


  1. Preheat oven to 400 degrees F. Spray a 2-quart baking dish with olive oil. 
  2. Heat the olive oil in a large skillet over medium-high heat, about 2 minutes. Add the beef and the onions. Cook, stirring to break up the beef, until the meat is browned and the onion is soft, about 5 minutes. 
  3. If there are liquids at the bottom of the skillet, drain the mixture and return it to the skillet. 
  4. Stir in the kosher salt, black pepper, and garlic. Cook, stirring, 1 more minute.
  5. Turn the heat off. Stir in the mayonnaise, unsweetened ketchup, mustard, and 1 cup cheddar. 
  6. Transfer the mixture to the prepared baking dish. Sprinkle with the remaining cheese. 
  7. Bake until the cheese is melted and the casserole is heated through, about 15 minutes. Or, if your baking dish is broiler-safe, broil the casserole 6 inches below the heating element (not directly below) until cheese is melted, 1-2 minutes.