Keto Cheeseburger Casserole – Are you a cheeseburger lover but want to stick to your keto diet? Then this recipe is perfect for you! This Keto Cheeseburger Casserole is the perfect combination of savory ground beef, onions, and shredded cheddar cheese. The addition of unsweetened ketchup and mustard adds an extra zing of flavor that makes this dish truly irresistible. Plus, it’s so easy to make and only takes 30 minutes from start to finish!
My husband and I are huge fans of cheeseburgers, but since we started following a keto diet, we’ve had to give them up. That was until we discovered this Keto Cheeseburger Casserole recipe! It has become a staple in our household, and we make it at least once a week. We love how easy it is to make and how it satisfies our cheeseburger cravings without derailing our diet. Plus, it’s a hit with our little ones too!
Why This Keto Cheeseburger Casserole is a Must-Try?
- It’s a delicious and healthier version of a classic cheeseburger
- It’s easy to make and only takes 30 minutes
- It’s keto-friendly and low-carb
- It’s packed with savory flavors from the ground beef, onions, and shredded cheddar cheese
- It’s a crowd-pleaser that will satisfy everyone’s cheeseburger cravings
Ingredients:
- 907 g (2 lbs.) extra-lean ground beef
- 2 tsp coarse kosher salt
- ¼ cup avocado oil mayonnaise
- ¼ tsp black pepper
- 1 tbsp. minced garlic
- Olive oil spray for the baking dish
- ¼ cup unsweetened ketchup
- 1 medium onion finely chopped (about 170 g or 6 oz.)
- 1 ½ cups shredded sharp cheddar divided (about 170 g or 6 oz.)
- 30 ml (2 tbsp.) olive oil
- 1 tbsp. mustard
Directions:
Preheat 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 2 minutes. Add onions and beef.
Cook, stirring to break up the beef, until the beef is browned and the onion is tender for 5 minutes. When there are fluids in the bottom of the skillet, then drain the mix and then return it to the skillet.
Stir in the black pepper, garlic, and kosher salt. Cook, stirring for a few minutes.
Turn off the heat. Stir in the unsweetened ketchup, mayonnaise, mustard, and 1 cup 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 15 minutes.
Or, if your baking dish is broiler-safe, broil the casserole 6-inches below the heating element (not straight under) till cheese is melted, for 1-2 minutes.
Notes:
- For a spicier version, add a pinch of cayenne pepper or red pepper flakes.
- To make it even more keto-friendly, you can use a homemade or low-carb ketchup.
- Leftovers can be stored in the refrigerator for up to 3 days, or in the freezer for up to 3 months.
In conclusion, this Keto Cheeseburger Casserole is a delicious and satisfying low-carb meal that will please the whole family. It’s easy to make, packed with flavor, and perfect for a busy weeknight dinner. The combination of ground beef, onions, cheese, and savory condiments creates a classic cheeseburger taste that’s hard to resist. Plus, it’s keto-friendly, gluten-free, and can be customized to your liking. Whether you’re following a ketogenic diet or just looking for a tasty and healthy meal, this recipe is a must-try. So give it a go and enjoy a warm and comforting casserole that’s sure to become a new favorite!
FAQ
Can I use ground turkey or chicken instead of beef?
Yes, you can use any ground meat of your choice, just make sure it’s extra lean.
Can I omit the mayonnaise?
Yes, you can omit the mayonnaise or substitute it with sour cream or Greek yogurt.
Can I use a different type of cheese?
Yes, you can use any shredded cheese you like, but make sure it’s a hard and flavorful cheese that melts well.
Can I make this recipe ahead of time?
Yes, you can prepare the casserole ahead of time and store it in the refrigerator until ready to bake. Just add a few minutes to the baking time to ensure it’s heated through.

Keto Cheeseburger Casserole
Ingredients
- 907 g 2 lbs. extra-lean ground beef
- 2 tsp coarse kosher salt
- ¼ cup avocado oil mayonnaise
- ¼ tsp black pepper
- 1 tbsp. minced garlic
- Olive oil spray for the baking dish
- ¼ cup unsweetened ketchup
- 1 medium onion finely chopped about 170 g or 6 oz.
- 1 ½ cups shredded sharp cheddar divided about 170 g or 6 oz.
- 30 ml 2 tbsp. olive oil
- 1 tbsp. mustard
Instructions
- Preheat 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 2 minutes. Add onions and beef.
- Cook, stirring to break up the beef, until the beef is browned and the onion is tender for 5 minutes. When there are fluids in the bottom of the skillet, then drain the mix and then return it to the skillet.
- Stir in the black pepper, garlic, and kosher salt. Cook, stirring for a few minutes.
- Turn off the heat. Stir in the unsweetened ketchup, mayonnaise, mustard, and 1 cup 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 15 minutes.
- Or, if your baking dish is broiler-safe, broil the casserole 6-inches below the heating element (not straight under) till cheese is melted, for 1-2 minutes.
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