Why You’ll Love This Recipe
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Only 7 ingredients — all pantry staples
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15 minutes prep, 30-35 minutes bake — dinner in under an hour
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One baking dish — easy prep, even easier cleanup
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High-protein, low-carb — under 5g net carbs per serving
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Costs under $10 — feeds 6 generously
Low-Carb Bacon Cheeseburger Casserole
Prep Time: 15 minutes | Bake Time: 30-35 minutes | Total Time: 45-50 minutes
Yield: 6 servings
Ingredients
For the Casserole Base:
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2 lbs (900g) ground beef (85/15 blend recommended for best flavor)
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6 slices bacon, cooked until crisp and crumbled
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2 cups shredded cheddar cheese (full-fat, low-moisture)
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½ cup sugar-free ketchup (or homemade keto ketchup*)
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2 tablespoons yellow mustard
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1 teaspoon garlic powder
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Salt and black pepper to taste
Optional Toppings (for serving):
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Dill pickle slices
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Diced red onion
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Sliced avocado
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Sour cream
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Shredded lettuce (add just before serving)
*Homemade Keto Ketchup: Mix ¼ cup tomato paste + 1 tablespoon apple cider vinegar + 1 tablespoon erythritol (or your preferred keto sweetener) + a pinch of onion powder, garlic powder, and allspice.
Instructions
1. Prep & Preheat:
Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish with nonstick spray or a thin layer of oil.
2. Cook the Bacon:
In a large skillet over medium heat, cook the bacon until crisp. Transfer to a paper towel-lined plate to drain. Once cool, crumble or chop into small pieces. (Leave about 1 tablespoon of bacon drippings in the skillet if desired for extra flavor.)
3. Brown the Ground Beef:
In the same skillet (reserving those bacon drippings for flavor), cook the ground beef over medium heat until fully browned and no longer pink, breaking it up with a spatula, about 6-8 minutes. Carefully drain off excess fat — this is essential to prevent a greasy casserole.
4. Build the Flavor:
Return the skillet to the heat. Stir in the sugar-free ketchup, yellow mustard, garlic powder, and a pinch of salt and pepper. Let it simmer for about 3 minutes, allowing the flavors to meld.
Remove the skillet from the heat. Stir in half of the crumbled bacon (reserve the other half for the top) and half of the shredded cheddar cheese (1 cup). Mix until the cheese begins to melt into the meat.
5. Assemble the Casserole:
Transfer the beef mixture to the prepared 9×13-inch baking dish, spreading it into an even layer.
Top with the remaining 1 cup of shredded cheddar cheese, followed by the reserved crumbled bacon.
6. Bake:
Place the casserole in the preheated oven, uncovered, and bake for 30-35 minutes, or until the cheese is fully melted, bubbly, and beginning to brown at the edges.
7. Rest & Serve:
Remove the casserole from the oven and let it rest for 5-10 minutes. This allows the casserole to set slightly, making it easier to slice and serve.
Serve hot, topped with your choice of dill pickles, red onion, avocado, or a dollop of sour cream.
Pro Tips for the Perfect Keto Cheeseburger Casserole
Drain the beef well: This is the single most important step. Excess fat will pool at the bottom of the dish and create a greasy, unappetizing texture. For extra insurance, you can even blot the cooked beef with paper towels.
Use full-fat, low-moisture cheese: Pre-shredded cheese often contains starches to prevent clumping (which adds unwanted carbs). Shredding your own block of cheddar ensures a creamier melt and keeps the carb count lower.
No breadcrumbs needed: Traditional casseroles often use binders, but the cheese and natural fats in this recipe create a perfect, cohesive texture without them. This is truly grain-free.
Customize your toppings: The beauty of a cheeseburger is the toppings bar. Serve this casserole with small bowls of pickles, onions, avocado, sugar-free ketchup, and mustard so everyone can build their perfect bite.
Make it ahead: This casserole is meal-prep gold. Assemble completely (without baking), cover, and refrigerate for up to 2 days. When ready to eat, add 10-15 minutes to the bake time since you’re starting from cold.
Nutritional Snapshot (Approximate per serving)
Values vary based on specific ingredients used.
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Calories: ~450
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Protein: ~38g
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Fat: ~30g
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Carbohydrates: ~6g total
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Net Carbs: ~4-5g (excluding fiber and sugar alcohols)
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Fiber: ~1g
Recipe Variations
Spicy Cheeseburger Casserole: Add 1 teaspoon of cayenne pepper or 2 tablespoons of chopped pickled jalapeños to the beef mixture. Top with pepper jack cheese instead of cheddar.
Bacon Cheeseburger & Egg Casserole (Breakfast Style): After spreading the beef mixture in the dish, create 6 small wells and crack an egg into each. Top with cheese and bacon, then bake until the eggs are set to your liking.
Mushroom Swiss Burger Casserole: Replace the cheddar with shredded Swiss cheese and add 8 oz of sautéed mushrooms to the beef mixture. Omit the mustard for a more savory, earthy flavor.