This Big Mac Casserole is a cheesy low carb dinner that brings all the flavor of your favorite fast food burger, without the bun or the guilt. It's baked in a casserole dish and topped with melted cheese and sesame seeds, then served with a sweet and tangy homemade sauce.
This recipe reminds me of the old cheeseburger pie Mom used to make with biscuit mix. I loved it, but this version fits perfectly into the keto lifestyle. Kind of like how my Big Mac Salad became another fun twist on fast food at home.
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Why You'll Love Big Mac Casserole
Keto friendly: only 7 net carbs per serving and full of satisfying flavor.
Family approved: even the carb lovers in the house won't miss the bun.
Budget smart: cheaper than drive thru burgers, and you control the ingredients.
Key Ingredients
Ground Beef: use a lean blend for the best flavor and texture.
Eggs: helps set the casserole as it bakes
Heavy Cream: adds richness and creaminess to the base.
Cream Cheese: melts beautifully on top and adds sharp flavor.
Sesame Seeds: mimics the classic Big Mac bun topping.
Coconut Aminos: a low carb alternative to Worcestershire sauce.
Sugar Free Ketchup: keeps the sauce keto while still sweet and tangy.
Homemade Pickle Relish: brings in that signature Big Mac taste.
Smoked Paprika: adds depth to the sauce with a mild smoky flavor.
Ingredient Substitutions
- Swap heavy cream with half and half if needed.
- Use ground turkey or chicken instead of beef.
- Try colby jack or velveeta shreds in place of cheddar cheese.
Variations
- Stir in a sauteed jalapeno with the onions for a little heat.
- Use sugar-free Thousand Island Dressing instead of homemade sauce.
- Top with sliced tomatoes before baking for extra juiciness.
Top Tips for Success
- Let the beef mixture cool slightly before adding the egg mixture.
- For crispy edges, bake uncovered for the last 5 minutes.
- Make extra sauce, trust me, you'll want to drizzle more on your plate.
Storage & Reheating
- Fridge: store in airtight container up to 5 days.
- Freeze: portion into individual freezer safe containers without the sauce.
- Reheat: microwave until warmed through or bake at 350°F for 10-15 minutes.
Serving Suggestions
- Add a healthy green veggie side by serving this casserole with Air Fryer Broccolini.
- Keep it low carb by serving with a side of Cheesy Cauliflower Steaks.
- Add some crunch with a side of my Aunt Bonnie's Homemade Garlic Dill Pickles.
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📖 Recipe
Big Mac Casserole
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Ingredients
FOR THE CASSEROLE
- 1½ pound ground beef
- ½ cup diced onion
- 1 teaspoon garlic powder
- ½ teaspoon salt
- ¼ teaspoon black pepper
- 3 tablespoons coconut aminos
- 2 tablespoons dill pickle relish
- 2 ounces cream cheese
- 4 large eggs
- ½ cup heavy cream
- 1½ cups shredded cheddar cheese
- 1 tablespoon sesame seeds optional
FOR THE MAC SAUCE
- ¼ cup Mayonnaise
- ¼ cup Sugar-free ketchup
- 2 tablespoons Dill Pickle Relish
- ½ teaspoon Garlic Powder
- ½ teaspoon Smoked Paprika
Instructions
- Preheat oven to 350 degrees.
- In a large skillet over medium heat, cook the ground beef until it begins to brown. Stir in the onion, garlic powder, and salt and cook for 7 minutes, or until beef has browned and onion has softened.
- Stir in the coconut aminos and cream cheese until incorporated. Turn off the heat and set aside.
- Spray a 9x13 casserole dish with cooking spray. Spread the beef mixture in the bottom of the casserole dish.
- In a small mixing bowl, whisk together the eggs and heavy cream. Pour the heavy cream mixture over the meat mixture evenly.
- Sprinkle the Big Mac Casserole with the shredded cheese and place in the oven to bake for 20 minutes.
- Remove the casserole from the oven and sprinkle with sesame seeds (if using). Return the casserole to the oven and bake for 10 minutes or until the cheese is melted and casserole is cooked through.
- While the casserole is baking, make the Big Mac Sauce. Mix the mayonnaise, ketchup, pickle relish, garlic powder, and smoked paprika together until combined. Store in the refrigerator until ready to serve.
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