A Keto Cheeseburger Casserole is everything I love about a classic cheeseburger—minus the carbs. It’s a rich, cheesy, and savory dish that layers ground beef, cheese, and all the burger fixings into a warm and comforting casserole. It’s the kind of meal I crave when I want comfort food that still fits into my low-carb lifestyle.

Keto Cheeseburger Casserole

Why You’ll Love This Recipe

I love this recipe because it’s quick, simple, and deeply satisfying. It brings all the juicy flavors of a cheeseburger into one easy-to-make dish. It’s perfect for family dinners, meal prep, or just a cozy night at home. Plus, it’s keto-friendly, so I don’t have to worry about hidden carbs. The ingredients are basic, the prep is minimal, and the result is irresistibly good.

Ingredients

(Here’s a tip: Check out the full list of ingredients and measurements in the recipe card below.)

2 pounds ground beef
1 medium onion, finely chopped
2 tablespoons olive oil
2 teaspoons kosher salt
¼ teaspoon black pepper
1 tablespoon minced garlic
¼ cup mayonnaise
¼ cup unsweetened ketchup
1 tablespoon mustard
1½ cups shredded sharp cheddar cheese, divided
Olive oil spray for greasing the baking dish

Directions

I preheat the oven to 400°F (200°C) and lightly grease a 2-quart baking dish.
In a large skillet, I heat olive oil over medium heat. I sauté the onion until soft, then add the ground beef, salt, pepper, and garlic. I cook everything until the beef is fully browned.
I reduce the heat to low and stir in the mayo, ketchup, mustard, and 1 cup of the shredded cheese until it’s all melted and blended.
I transfer the mixture to the greased baking dish and sprinkle the remaining cheese over the top.
I bake it for about 15 minutes, or until the cheese is bubbly and golden.
Once out of the oven, I let it rest for a few minutes before serving.

Servings and timing

This casserole serves 6 to 8 people and takes about 35 minutes total:

10 minutes for prep
20 minutes to cook the beef mixture
15 minutes to bake

Variations

When I want to change things up, I sometimes add chopped pickles, diced tomatoes to the mix. I’ve also swapped cheddar for pepper jack or added a sprinkle of smoked paprika for a deeper flavor. For a more veggie-packed version, I mix in riced cauliflower or chopped spinach.

Storage/Reheating

I store leftovers in an airtight container in the fridge for up to 4 days. To reheat, I microwave individual portions at 50% power so the cheese doesn’t overcook. If I’ve made a big batch, I reheat it in the oven at 350°F until it’s warmed through. This casserole also freezes well—just let it cool completely and wrap it tightly before freezing.

FAQs

How do I keep the casserole from being too greasy?

I make sure to drain excess fat from the beef before adding the other ingredients. Using lean ground beef also helps.

Can I make this ahead of time?

Yes, I often prepare the casserole the night before, cover it, and refrigerate it. When I’m ready to eat, I just bake it as usual.

Is this recipe gluten-free?

Yes, this recipe is naturally gluten-free as long as the condiments I use don’t contain added gluten.

What can I serve with keto cheeseburger casserole?

I usually serve it with a side salad, roasted vegetables, or even a scoop of cauliflower mash to keep it low-carb.

Can I use ground turkey instead of beef?

Definitely. I’ve made this with ground turkey and it turns out just as delicious—just slightly lighter in flavor.

Conclusion

This Keto Cheeseburger Casserole is one of those dishes that always hits the spot. It’s hearty, flavorful, and incredibly easy to throw together. Whether I’m feeding my family or prepping meals for the week, it’s a reliable go-to that never disappoints. I love how it brings all the best parts of a cheeseburger into a single, satisfying dish—without the carbs.