Keto Cheeseburger Casserole
A rich, cheesy, and deeply satisfying low-carb meal that delivers classic burger flavor without the bun. Perfect for busy weeknights, this comforting dish comes together in just 25 minutes.
Ingredients
- 2 tbsp olive oil for sautéing
- 2 lbs extra-lean ground beef 93% lean preferred
- 1 medium onion 6 oz, finely chopped
- 2 tsp Diamond Crystal kosher salt use 1 tsp if using Morton or table salt
- 1/4 tsp black pepper freshly cracked preferred
- 1 tbsp garlic minced fresh cloves
- 1/4 cup mayonnaise full-fat only
- 1/4 cup unsweetened ketchup
- 1 tbsp mustard classic yellow
- 1 1/2 cups sharp cheddar cheese divided; grate fresh from a block
Instructions
- Preheat your oven to 400°F. Lightly grease a two-quart baking dish with butter.
- Heat the olive oil in a large skillet over medium-high heat for about two minutes.
- Add the ground beef and chopped onion. Cook, breaking up the meat with a spatula, until the beef is browned and onions are soft (about 5 minutes).
- Drain any excess liquid from the skillet thoroughly. Return the meat mixture to the pan.
- Stir in the kosher salt, black pepper, and minced garlic. Cook for exactly one more minute, stirring constantly to bloom the garlic.
- Turn off the heat. Stir in the mayonnaise, unsweetened ketchup, and mustard until the beef is evenly coated.
- Fold in one cup of the shredded cheddar. Transfer the mixture to your prepared baking dish and spread evenly.
- Sprinkle the remaining half cup of cheese over the top. Bake for 15 minutes until the cheese is fully melted and bubbly.
Notes
Always grate your cheese fresh for the best melt. For a deeper flavor, try adding 1/2 tsp of smoked paprika. For a crispy finish, broil for 1 minute at the end of baking, watching closely.