If you’re craving all the hearty flavors of a classic cheeseburger without the bun or carbs, this Keto Cheeseburger Casserole Recipe is going to become your new go-to comfort food. It combines juicy, seasoned ground beef with that irresistible melted cheddar cheese and a tangy, creamy sauce that mimics every delicious element of a cheeseburger. Best of all, it comes together quickly and delivers big on flavor, making it perfect for busy weeknights or anytime you want something satisfying and keto-friendly.
Ingredients You’ll Need
These ingredients are straightforward, wholesome, and essential to bringing the perfect balance of juicy beefiness, tangy sauce, and sharp cheese that defines this casserole. Each component plays a key role in texture and taste, making the dish rich, creamy, and comforting.
- Olive oil spray: Keeps the baking dish nonstick so your casserole comes out perfectly every time.
- 2 tablespoons olive oil: Adds flavor and helps brown the beef and onions beautifully.
- 2 pounds extra-lean ground beef: The star protein of the dish, bringing hearty flavor while keeping it lean and keto-friendly.
- 1 medium onion, finely chopped: Adds sweetness and depth as it softens with the beef.
- 2 teaspoons Diamond Crystal kosher salt: Essential for seasoning and enhancing all the flavors.
- 1/4 teaspoon black pepper: Adds a subtle heat and balance to the savory beef.
- 1 tablespoon fresh garlic, minced: Delivers aromatic pungency and savory richness.
- 1/4 cup mayonnaise: Brings creaminess and a slight tang to the sauce.
- 1/4 cup unsweetened ketchup: Adds that classic cheeseburger tang without extra sugar.
- 1 tablespoon mustard: A little zing to brighten and lift the flavor profile.
- 1 1/2 cups sharp cheddar cheese, shredded and divided: The melty, golden crown that makes this casserole absolutely crave-worthy.
How to Make Keto Cheeseburger Casserole Recipe
Step 1: Preheat Oven and Prepare Baking Dish
Start by preheating your oven to 400°F (200°C). Lightly spray a 2-quart baking dish with olive oil spray to ensure your luscious casserole doesn’t stick and releases easily after baking. This simple preparation step makes cleanup a breeze!
Step 2: Brown Beef and Onions
Heat 2 tablespoons of olive oil in a large skillet over medium-high heat for about 2 minutes. Toss in your extra-lean ground beef and finely chopped onion. Cook while breaking up the meat with a spoon until the beef is no longer pink and the onion has softened, about 5 minutes. This browning process develops deep, savory flavor that’s key to the dish.
Step 3: Drain and Season
If there’s any liquid released during cooking, carefully drain it off to keep the casserole from getting soggy. Return the beef and onions to the pan, then stir in the kosher salt, black pepper, and minced garlic. Cook everything together for another minute, letting the garlic release its wonderful aroma and the seasoning deeply penetrate the beef.
Step 4: Add Sauce and Cheese
Turn off the heat and fold in the mayonnaise, unsweetened ketchup, and mustard, blending those classic burger flavors into the beef. Then add 1 cup of the shredded sharp cheddar cheese and stir until melted and evenly distributed. This cheesy, tangy mix is what sets this casserole apart!
Step 5: Assemble and Bake
Transfer the beef mixture into your prepared baking dish, spreading it out evenly. Sprinkle the remaining 1/2 cup of cheddar cheese over the top for that golden, bubbly crust. Bake in the preheated oven for about 15 minutes until the cheese melts and the casserole is nicely heated through. For an extra touch, you can broil the top 6 inches below the element for 1 to 2 minutes until bubbly and golden. Serve it piping hot!
How to Serve Keto Cheeseburger Casserole Recipe
Garnishes
To take your Keto Cheeseburger Casserole Recipe to the next level, fresh garnishes like chopped pickles, diced tomatoes, or sliced green onions add a pop of color and refreshing crunch, balancing its rich, cheesy nature. A dollop of sour cream or a sprinkle of fresh parsley also works wonders.
Side Dishes
Though this casserole is a complete meal on its own, pairing it with simple low-carb sides enhances the experience. Think crisp lettuce wedges for a DIY bunless “burger” wrap or a fresh cucumber salad to add cool, crisp contrast to the warm, cheesy dish.
Creative Ways to Present
If you’re serving this dish to guests or want to mix things up, try portioning it into individual ramekins or mini cast iron skillets for charming single servings. It’s a fun way to present the Keto Cheeseburger Casserole Recipe that’ll impress everyone at the table!
Make Ahead and Storage
Storing Leftovers
This casserole keeps incredibly well in the fridge. Store leftovers in an airtight container for up to 4 days. The flavors actually deepen, making it even tastier the next day. Just be sure to reheat thoroughly before digging in again.
Freezing
You can freeze this Keto Cheeseburger Casserole Recipe if you want to prep in advance. Place it in a freezer-safe dish or container, cover tightly, and freeze for up to 3 months. Thaw overnight in the fridge before reheating for best results.
Reheating
For reheating, cover the casserole loosely with foil and warm it in a 350°F (175°C) oven for about 15-20 minutes until heated through. Alternatively, microwave individual portions on medium power to avoid overcooking the meat and cheese.
FAQs
Can I use a different type of cheese in this recipe?
Absolutely! While sharp cheddar gives the classic cheeseburger flavor and great melt, you can swap in mozzarella, pepper jack, or even a blend of cheeses depending on your taste preferences.
Is this recipe suitable for a strict keto diet?
Yes, it is! This casserole is low in carbs and high in fat and protein, which fits perfectly into a strict ketogenic way of eating. Just ensure any condiments you use, like ketchup, are truly sugar-free.
How can I make this recipe spicier?
If you love some heat, try stirring in a bit of diced jalapeño or spicy mustard before baking, or top your serving with a drizzle of hot sauce or sliced fresh chili peppers.
Can I swap ground beef for another meat?
Certainly! Ground turkey or chicken can be used if you prefer a lighter protein. Keep in mind these have a milder flavor so you might want to boost seasoning just a bit.
What’s the best way to reheat without drying it out?
Cover the casserole with foil when reheating in the oven to help retain moisture. For microwave reheating, sprinkle a tiny bit of water on top and cover with a microwave-safe lid or wrap to keep it juicy.
Final Thoughts
You really can’t go wrong with this Keto Cheeseburger Casserole Recipe. It’s comfort food at its finest—full of rich, cheesy goodness and all the flavors of your favorite cheeseburger without the carbs. I loved how easy it was to make, and I know once you try it, this dish will quickly become one of your favorites too. So go ahead, gather those simple ingredients, and enjoy a warm, satisfying meal that feels like a treat every time!
Print
Keto Cheeseburger Casserole Recipe
- Prep Time: 10 minutes
- Cook Time: 20 minutes
- Total Time: 30 minutes
- Yield: 6 servings
- Category: Main Course
- Method: Baking
- Cuisine: American
- Diet: Low Carb
Description
This Keto Cheeseburger Casserole is a delicious low-carb twist on the classic cheeseburger, combining juicy browned ground beef with sautéed onions, a creamy tangy sauce, and sharp cheddar cheese baked to bubbly perfection. Ready in just 30 minutes, it’s a perfect hearty and keto-friendly meal that serves six.
Ingredients
For the Casserole:
- Olive oil spray, for greasing the baking dish
- 2 tablespoons olive oil
- 2 pounds extra-lean ground beef
- 1 medium onion, finely chopped (about 6 ounces)
- 2 teaspoons Diamond Crystal kosher salt
- 1/4 teaspoon black pepper
- 1 tablespoon fresh garlic, minced
- 1/4 cup mayonnaise
- 1/4 cup unsweetened ketchup
- 1 tablespoon mustard
- 1 1/2 cups sharp cheddar cheese, shredded and divided (about 6 ounces total)
Instructions
- Preheat Oven and Prepare Baking Dish: Preheat your oven to 400°F (200°C). Spray a 2-quart baking dish with olive oil spray to prevent sticking.
- Brown Beef and Onions: Heat olive oil in a large skillet over medium-high heat for about 2 minutes. Add the ground beef and chopped onion. Cook, breaking up the meat with a spoon, until the beef is browned and the onion is soft, about 5 minutes.
- Drain and Season: If there is liquid in the skillet, carefully drain it. Return the mixture to the skillet and stir in kosher salt, black pepper, and minced garlic. Cook for 1 additional minute, stirring constantly to blend flavors.
- Add Sauce and Cheese: Turn off the heat. Mix in mayonnaise, unsweetened ketchup, mustard, and 1 cup of the shredded cheddar cheese. Stir until the mixture is well combined.
- Assemble Casserole: Transfer the beef mixture to the prepared baking dish. Evenly sprinkle the remaining 1/2 cup cheddar cheese over the top.
- Bake or Broil: Bake in the preheated oven until cheese is melted and the casserole is heated through, about 15 minutes. Alternatively, if using a broiler-safe dish, broil 6 inches below the element for 1–2 minutes until bubbly and golden. Serve hot.
Notes
- Diamond Crystal kosher salt is recommended for its milder saltiness; adjust if using other salts.
- Unsweetened ketchup is used to keep the recipe keto-friendly by avoiding added sugars.
- Using extra-lean ground beef helps reduce fat and keeps the casserole lean while still flavorful.
- Broiling is a faster method to melt and brown the cheese but watch closely to avoid burning.
