This Keto Cheeseburger Casserole is a delightful twist on a classic favorite, offering a hearty and filling meal that fits perfectly into your low-carb lifestyle. With its rich flavors and warm, comforting texture, this casserole is ideal for weeknight dinners, potlucks, or any occasion that calls for a satisfying dish. It’s not only easy to prepare but also packs all the flavors you love about cheeseburgers without the carbs.
Why You’ll Love This Recipe
- Quick and Easy Preparation: This casserole can be assembled in just 15 minutes, making it perfect for busy weeknights.
- Hearty and Filling: With generous portions of ground beef and cheese, this dish will keep you satisfied.
- Low-Carb Delight: Perfect for those following a keto diet while still enjoying the taste of a cheeseburger.
- Versatile Ingredients: Customizable with your favorite toppings or sides, such as avocado or low-carb veggies.
- Family-Friendly Meal: Kids and adults alike will love this comforting dish packed with flavor.
Tools and Preparation
Before diving into the cooking process, gather your essential tools to ensure everything goes smoothly.
Essential Tools and Equipment
- Large skillet
- 2-quart baking dish
- Olive oil spray
- Mixing spoon
Importance of Each Tool
- Large skillet: This allows for even cooking of the beef and onions, ensuring great flavor integration.
- 2-quart baking dish: The perfect size for holding all the ingredients together while baking.
- Olive oil spray: Helps prevent sticking when preparing your baking dish for easy cleanup.

Ingredients
This simple keto cheeseburger casserole is filling and hearty and makes a superb low-carb option to your cheeseburger.
For the Casserole
- 2 lbs extra lean ground beef
- 2 tsp coarse kosher salt (not fine 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 6 oz))
- 1 ½ cup shredded sharp cheddar (divided (about 6 oz))
- 2 tbsp olive oil
- 1 tbsp mustard
How to Make Keto Cheeseburger Casserole
Step 1: Preheat the Oven
Preheat your oven to 400°F. While it’s heating up, spray a 2-quart baking dish with olive oil to prevent sticking.
Step 2: Cook the Beef and Onions
In a large skillet over medium-high heat:
1. Heat the olive oil for about 2 minutes.
2. Add finely chopped onions and ground beef.
3. Cook while stirring to break up the beef until it’s browned and onions are tender (approximately 5 minutes).
4. Drain any excess fluids from the skillet before returning the mixture.
Step 3: Seasoning
Stir in black pepper, minced garlic, and kosher salt. Continue cooking while stirring for another minute or so until fragrant.
Step 4: Combine Sauce Ingredients
Turn off the heat:
1. Add unsweetened ketchup, avocado oil mayonnaise, mustard, and 1 cup of shredded cheddar cheese.
2. Mix well until combined.
Step 5: Transfer to Baking Dish
Transfer the beef mixture into your prepared baking dish:
1. Spread it evenly across the bottom.
2. Sprinkle with the remaining shredded cheddar cheese on top.
Step 6: Bake
Place in the preheated oven:
– Bake for about 15 minutes or until cheese is melted and casserole is heated through.
Optional Step: Broil for Extra Crispiness
If your baking dish is broiler-safe:
– Broil it about 6 inches below the heating element for an additional 1-2 minutes until cheese is bubbly and golden brown.
Enjoy this delicious Keto Cheeseburger Casserole as a main course that’s sure to please everyone at your table!
How to Serve Keto Cheeseburger Casserole
Serving your Keto Cheeseburger Casserole can enhance the meal experience. Here are some delightful suggestions to complement this hearty dish.
Pair with a Fresh Salad
- Caesar Salad – Crisp romaine lettuce, creamy dressing, and Parmesan cheese add a refreshing contrast.
- Cucumber Tomato Salad – A light salad with diced cucumbers and tomatoes drizzled with olive oil and vinegar for a zesty touch.
Add Low-Carb Vegetables
- Steamed Broccoli – Simple and nutritious, broccoli brings fiber to your plate and balances the richness of the casserole.
- Roasted Brussels Sprouts – Tossed in olive oil and roasted until crispy, these sprouts are a flavorful addition.
Serve with Dipping Sauces
- Guacamole – Creamy avocado dip that pairs wonderfully with the savory flavors of the casserole.
- Ranch Dressing – A classic choice that adds creaminess and tang, perfect for drizzling over each serving.
How to Perfect Keto Cheeseburger Casserole
To achieve the best results with your Keto Cheeseburger Casserole, consider these helpful tips.
- Choose Lean Meat – Using extra lean ground beef minimizes excess fat while maintaining flavor.
- Mix Ingredients Well – Ensure all sauce ingredients blend together for an even taste throughout the casserole.
- Watch Cooking Time – Keep an eye on your casserole as baking times may vary depending on your oven; don’t overcook!
- Use Fresh Ingredients – Fresh onions and garlic elevate flavors; opt for fresh rather than pre-minced products.
- Experiment with Cheese – Try different types of cheese like pepper jack or mozzarella for varied flavor profiles.
- Garnish Before Serving – Adding chopped parsley or green onions right before serving can enhance presentation and freshness.
Best Side Dishes for Keto Cheeseburger Casserole
Pairing side dishes with your Keto Cheeseburger Casserole can make for a well-rounded meal. Here are some perfect options:
- Zucchini Noodles – Lightly sautéed zucchini noodles provide a low-carb alternative to pasta.
- Garlic Mashed Cauliflower – Creamy mashed cauliflower infused with garlic is a delicious substitute for traditional mashed potatoes.
- Coleslaw – A crunchy slaw made from cabbage and carrots dressed in a tangy vinaigrette complements the richness of the casserole.
- Stuffed Bell Peppers – Bell peppers filled with ground turkey or beef create a colorful side that matches the casserole’s flavors.
- Spinach Salad – Fresh spinach topped with avocados and nuts offers a healthy crunch alongside your main dish.
- Radish Chips – Thinly sliced radishes baked until crispy serve as a fun, low-carb snack to accompany each bite of casserole.
Common Mistakes to Avoid
Avoiding common mistakes can help you create a delicious Keto Cheeseburger Casserole. Here are some pitfalls to watch out for:
- Using the wrong ground meat: Opt for extra-lean ground beef, as it keeps the dish light. Using fattier meats can result in an overly greasy casserole.
- Not draining excess liquid: After cooking the beef and onions, always drain any fluids. This prevents your casserole from becoming soggy and enhances its flavor.
- Skipping seasoning: Don’t forget to add salt, pepper, and other seasonings. Well-seasoned dishes elevate the overall taste of your Keto Cheeseburger Casserole.
- Overbaking the cheese: Keep an eye on the casserole while it bakes. Overbaking can lead to tough cheese instead of a gooey topping.
- Ignoring ingredient measurements: Stick closely to the recipe’s measurements for ingredients like mayonnaise and ketchup to maintain the right balance of flavors.

Storage & Reheating Instructions
Refrigerator Storage
- Store leftovers in an airtight container.
- The casserole will stay fresh for up to 3 days in the refrigerator.
Freezing Keto Cheeseburger Casserole
- Freeze portions in airtight containers or freezer bags.
- It can be stored for up to 3 months.
Reheating Keto Cheeseburger Casserole
- Oven: Preheat to 350°F and cover with foil until heated through, about 20 minutes.
- Microwave: Place in a microwave-safe dish and heat on medium power for 2-3 minutes, stirring halfway through.
- Stovetop: Heat in a skillet over low heat, stirring occasionally until warmed through.
Frequently Asked Questions
Here are some common questions about making and enjoying Keto Cheeseburger Casserole.
What is Keto Cheeseburger Casserole?
Keto Cheeseburger Casserole is a low-carb dish that combines ground beef, cheese, and keto-friendly condiments into a hearty meal perfect for any occasion.
Can I customize my Keto Cheeseburger Casserole?
Absolutely! Feel free to add vegetables like bell peppers or mushrooms for extra flavor and nutrition. You can also swap out cheddar for your favorite cheese.
How do I store leftover Keto Cheeseburger Casserole?
Leftovers should be kept in an airtight container in the fridge for up to 3 days or frozen for up to 3 months.
What can I serve with Keto Cheeseburger Casserole?
Serve it with a side salad or steamed vegetables for a complete meal that adheres to your low-carb lifestyle.
Final Thoughts
The Keto Cheeseburger Casserole is not only filling but also versatile enough to adapt according to your taste preferences. With its rich flavor profile and heartiness, it’s perfect for family dinners or meal prep. Don’t hesitate to try this recipe and customize it with your favorite low-carb ingredients!
Keto Cheeseburger Casserole
Indulge in the comforting flavors of a classic cheeseburger with this easy-to-make Keto Cheeseburger Casserole. Perfect for busy weeknights or family gatherings, this hearty dish combines ground beef and melted cheese, all while keeping your carb count low. Packed with rich flavors and a satisfying texture, it’s a delightful alternative to traditional casseroles that fit seamlessly into your low-carb lifestyle. Customize it with your favorite toppings like avocado or serve it alongside fresh salads and roasted veggies for a complete meal. Enjoy a satisfying dinner that everyone at the table will love!
- Prep Time: 15 minutes
- Cook Time: 15 minutes
- Total Time: 30 minutes
- Yield: Serves approximately 6 portions 1x
- Category: Main
- Method: Baking
- Cuisine: American
Ingredients
- 2 lbs extra lean ground beef
- 1 medium onion, finely chopped
- 1/4 cup avocado oil mayonnaise
- 1/4 cup unsweetened ketchup
- 1 tbsp mustard
- 1 ½ cups shredded sharp cheddar cheese (divided)
- 2 tsp coarse kosher salt
- 1 tbsp minced garlic
- Olive oil spray
Instructions
- Preheat your oven to 400°F and spray a 2-quart baking dish with olive oil.
- In a large skillet over medium-high heat, add olive oil, ground beef, and chopped onions. Cook until the beef is browned and onions are tender, about 5 minutes. Drain any excess liquid.
- Stir in black pepper, minced garlic, and kosher salt; cook until fragrant.
- Remove from heat and mix in ketchup, mayonnaise, mustard, and 1 cup of shredded cheddar cheese until well combined.
- Spread the mixture evenly in the prepared baking dish and sprinkle with remaining cheddar cheese on top.
- Bake for about 15 minutes or until the cheese is melted and bubbly.
Nutrition
- Serving Size: 1 cup (240g)
- Calories: 430
- Sugar: 3g
- Sodium: 720mg
- Fat: 30g
- Saturated Fat: 12g
- Unsaturated Fat: 16g
- Trans Fat: 0g
- Carbohydrates: 8g
- Fiber: 2g
- Protein: 36g
- Cholesterol: 90mg
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