This easy 30-minute keto cheeseburger casserole is hearty, filling, and an excellent alternative to a classic cheeseburger.
You can make this recipe as written and serve it with a side of veggies, or mix in veggies such as cauliflower rice or spinach and turn it into a complete meal.
Prep Time15minutes mins
Cook Time15minutes mins
Total Time30minutes mins
Course: Main Course
Cuisine: American
Servings: 6 servings
Calories: 458kcal
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Ingredients
- ▢Olive oil spray for the baking dish
- ▢2 tablespoons olive oil
- ▢2 pounds extra-lean ground beef
- ▢1 medium onion finely chopped (6 ounces)
- ▢2 teaspoons Diamond Crystal kosher salt or 1 teaspoon of any other salt
- ▢¼ teaspoon black pepper
- ▢1 tablespoon fresh garlic minced
- ▢¼ cup mayonnaise
- ▢¼ cup unsweetened ketchup
- ▢1 tablespoon mustard
- ▢1 ½ cup cheddar sharp, shredded, divided (6 ounces)
Instructions
- Preheat your oven to 400°F. Spray a 2-quart baking dish with olive oil.
- Heat the olive oil in a large skillet over medium-high heat for 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, for about 5 minutes.
- If there are liquids at the bottom of the skillet, carefully drain the mixture and return it to the skillet. Stir in the kosher salt, black pepper, and garlic. Cook, stirring, for 1 more minute.
- Turn the heat off. Stir in the mayonnaise, unsweetened ketchup, mustard, and 1 cup of shredded cheddar.
- Transfer the mixture to the prepared baking dish. Sprinkle with the remaining cheese.
- Bake until the cheese is melted and the casserole is heated through, for about 15 minutes. Alternatively, if your baking dish is broiler-safe, broil the casserole 6 inches below the heating element (not directly below) until the cheese is melted, 1-2 minutes. Serve immediately.
