This one-pan keto ground beef casserole turns browned beef, cream cheese, sour cream, cheddar, and mozzarella into a rich low-carb comfort dinner in about 35 minutes. The sauce builds in the same oven-safe skillet, so it works as a keto ground beef casserole with cream cheese while each serving stays at 5g net carbs without relying on pasta, rice, or a filler vegetable.
Table of Contents
Why this one-pan keto ground beef casserole works
- One skillet, start to finish: the beef browns, the cheese sauce builds, and the topping broils in the same oven-safe pan, so there is no casserole dish to wash.
- Two cheeses, two jobs: cream cheese and sour cream turn the pan sauce silky before the cheddar and mozzarella melt into a stretchy, browned top layer.
- Genuinely low carb: at 5 g net carbs per serving, it fits a standard keto target without leaning on a filler vegetable to bulk out the pan.
- Faster than most ovens preheat: about 35 minutes total, and most of that is hands-on stovetop time.
Ingredients
Makes 8 servings.
Equipment
How to make it
- Preheat and prep. Preheat the oven broiler on high and set a rack about 6 inches from the heat. Have the 12-inch oven-safe skillet within reach.
- Soften the aromatics. Melt the butter in the skillet over medium heat. Add the diced onion and cook, stirring occasionally, until softened and translucent, about 4 minutes.
- Brown the beef. Add the ground beef and minced garlic. Break the meat apart with a spatula and cook over medium-high heat, stirring often, until no pink remains and an instant-read thermometer inserted into the thickest clump reads 160°F (71°C), about 7 to 8 minutes. Drain off any fat beyond about 2 tablespoons.
- Build the cheese sauce. Reduce the heat to low. Add the cream cheese in small pieces and stir until it melts fully into the beef, about 2 minutes. Stir in the sour cream, smoked paprika, Italian seasoning, onion powder, salt, and pepper until the mixture is smooth and creamy.
- Fold in the first layer of cheese. Remove the skillet from the heat. Stir in 1 cup of the cheddar and all of the mozzarella until melted through and evenly distributed.
- Top and broil. Smooth the mixture into an even layer and scatter the remaining 1 cup cheddar over the top. Broil for 3 to 5 minutes, watching closely, until the cheese is fully melted and browning in spots.
- Rest and serve. Let the casserole rest for 5 minutes before serving — this gives the cheese sauce time to set so it holds together on the spoon instead of running. Garnish with parsley or green onion if using.
Practical cooking tips
- Watch the broiler, not the clock: broiler intensity varies a lot between ovens, so check at the 3-minute mark and every 30 seconds after — the gap between golden and burnt is under a minute.
- Confirm doneness with a thermometer, not color: ground beef can look fully browned before its center reaches a safe 160°F (71°C); an instant-read thermometer in the thickest clump is the reliable check, per USDA guidance.
- Shred your own cheese for this ultimate cheesy keto ground beef casserole: pre-shredded cheese is coated with anti-caking starch that can make the sauce grainy instead of silky.
- Let it rest before serving: cutting in immediately gives a loose, runny scoop; five minutes lets the cheese sauce firm up.
- No oven-safe handle? Transfer the beef and cheese sauce from step 5 into a 9×9-inch baking dish, top with the reserved cheddar, and broil there instead.
Swaps and variations
- Make it a low carb ground beef casserole with cream cheese but no alliums: skip the onion and garlic for a milder flavor; total carbs per serving drop by about 1 g.
- Swap in ground turkey (93/7) for a lighter version: fat drops from about 50 g to roughly 35 g per serving and calories from 606 to about 480, while protein stays close to 30 g.
- Stir 2 tbsp diced pickled jalapeños into the cheese sauce in step 4 for a spicier version; the change to carbs and calories per serving is negligible.
- Turn it into a one pan keto ground beef casserole with vegetables by folding 2 cups riced cauliflower in with the onion in step 2; this adds about 2 g net carbs per serving and stretches the batch to 9-10 servings.
- Want another skillet-only ground beef dinner in the same rotation? Our Keto Taco Skillet With Ground Beef uses the same 12-inch pan and is on the table in 25 minutes.
Storage and meal prep
This one-pan keto ground beef casserole meal prep is straightforward: cool completely, then refrigerate in an airtight container for up to 4 days. For longer storage, freeze portions in freezer-safe containers for up to 2 months, and thaw overnight in the refrigerator before reheating. To reheat keto ground beef casserole without drying out the cheese, warm it covered in a 325°F oven for about 15 minutes, or microwave individual portions in 30-second bursts, stirring between each. The cheese topping will not stay quite as glossy after freezing, but the flavor holds up well. For more make-ahead ideas, browse the rest of the Keto recipes on RecipesDiet.
Nutrition per serving
| Nutrient | Per serving |
|---|---|
| Calories | 606 kcal |
| Protein | 31 g |
| Fat | 50 g |
| Total carbs | 6 g |
| Fiber | 1 g |
| Net carbs | 5 g |
Nutrition is an estimate, calculated from USDA FoodData Central values, and it varies with brands and exact portion sizes.
Frequently asked questions
Is this ultimate cheesy keto ground beef casserole actually keto-friendly?
Yes. At 5 g net carbs per serving (6 g total carbs minus 1 g fiber), it fits easily within a standard 20 g-per-day keto carb target, even with two full cups of shredded cheese in the batch.
Can I make this one pan keto ground beef casserole without a broiler?
Yes. Skip the broiler and bake the topped skillet in a 400°F oven for 8 to 10 minutes instead, until the cheese is fully melted and just starting to brown at the edges.
What is the best way to reheat keto ground beef casserole leftovers?
Reheat covered in a 325°F oven for about 15 minutes for the best texture, or microwave in 30-second bursts if you are short on time; both keep the cheese from turning rubbery.
Can I do this keto ground beef casserole meal prep style for the whole week?
Yes. Portion the cooled casserole into 8 airtight containers; refrigerated portions stay good for up to 4 days, and it reheats well straight from the fridge.
Can I make this low carb ground beef casserole with cream cheese ahead and bake it later?
Yes. Assemble through step 5, refrigerate covered for up to 24 hours, then top with the reserved cheddar and broil straight from the fridge, adding one to two extra minutes.
Why did my casserole turn out watery instead of creamy?
This usually means the beef was not drained well enough, or the cream cheese was not fully melted before the sour cream went in; keep the heat low and stir until the base is smooth before folding in the shredded cheese.
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