If you’re looking for a comforting dinner that is cheesy, satisfying, and low in carbohydrates, this Cheesy Keto Meatball Casserole is an easy recipe to keep in your rotation. Tender homemade meatballs are baked in a rich tomato sauce, covered with plenty of melted cheese, and finished until bubbly and golden.
It has all the cozy flavors of a classic meatball bake without the pasta. Serve it with a crisp green salad, roasted vegetables, or steamed broccoli for a simple keto-friendly meal.
Ingredients
For the Meatballs
- 1 lb ground beef
- ½ lb ground pork
- 1 large egg
- ½ cup grated Parmesan cheese
- 2 cloves garlic, minced
- ½ teaspoon Italian seasoning
- ½ teaspoon onion powder
- ½ teaspoon salt
- ¼ teaspoon black pepper
- 2 tablespoons chopped fresh parsley
- 1 tablespoon olive oil, for browning
For the Casserole
- 2 cups low-sugar marinara sauce
- 1½ cups shredded mozzarella cheese
- ½ cup shredded cheddar cheese
- ¼ cup grated Parmesan cheese
- 1 teaspoon Italian seasoning
- 2 tablespoons chopped fresh parsley, for garnish
Instructions
1. Prepare the Meatballs
Preheat your oven to 400°F (200°C).
In a large bowl, combine the ground beef, ground pork, egg, Parmesan, garlic, Italian seasoning, onion powder, salt, black pepper, and parsley.
Mix gently with your hands or a fork until everything is evenly combined. Avoid overmixing, as this can make the meatballs dense.
Shape the mixture into approximately 18–20 meatballs.
2. Brown the Meatballs
Heat the olive oil in a large oven-safe skillet over medium-high heat.
Add the meatballs and brown them on several sides for about 5–7 minutes total. They don’t need to cook completely through at this stage.
Transfer them to a plate if necessary.
3. Add the Sauce
Spread about half of the marinara sauce across the bottom of the skillet or a medium baking dish.
Arrange the meatballs over the sauce, then spoon the remaining sauce around and over them.
4. Add the Cheese
Sprinkle the mozzarella, cheddar, and Parmesan evenly over the meatballs.
Finish with a sprinkle of Italian seasoning.
5. Bake
Place the casserole in the preheated oven and bake for approximately 20–25 minutes, or until the meatballs are cooked through and the cheese is melted, bubbling, and lightly golden.
For food safety, ground meat should reach an internal temperature of 160°F (71°C).
6. Rest and Serve
Remove the casserole from the oven and let it rest for about 5 minutes.
Garnish with fresh parsley and serve hot.
Tips for the Best Keto Meatball Casserole
Don’t overmix the meat. Gentle mixing helps keep the meatballs tender.
Choose a low-sugar sauce. Tomato sauces can vary significantly in carbohydrate content, so check the nutrition label if you’re following a strict keto plan.
Use freshly shredded cheese. It usually melts more smoothly than many pre-shredded varieties.
Brown the meatballs first. This adds extra flavor and gives the casserole a richer finished taste.
Don’t overcrowd the meatballs. Arrange them in a single layer so the sauce and cheese can surround each one.
Easy Variations
Spicy Meatball Casserole
Add ¼–½ teaspoon crushed red pepper flakes to the meatball mixture or sauce.
Garlic Parmesan Version
Add extra minced garlic and finish the casserole with additional Parmesan and fresh parsley.
Creamy Meatball Casserole
Stir a few tablespoons of cream cheese or heavy cream into the tomato sauce before adding the meatballs.
Chicken Meatballs
Replace the beef and pork with ground chicken or turkey. Because lean poultry can dry out more easily, avoid overcooking.
Extra Cheesy
Add a layer of provolone or Monterey Jack along with the mozzarella for an even richer cheese topping.
What to Serve With It
Keep the meal low-carb by serving the casserole with:
- Steamed broccoli
- Roasted cauliflower
- Garlic green beans
- Sautéed spinach
- Zucchini noodles
- A simple green salad
- Roasted asparagus
Storage
Allow leftovers to cool before transferring them to an airtight container.
Refrigerate for up to 3–4 days. Reheat gently in the microwave or in a covered oven-safe dish until heated through.
The cooked casserole can also be frozen in individual portions. Thaw overnight in the refrigerator before reheating for the best texture.
Frequently Asked Questions
Can I make this casserole ahead of time?
Yes. Prepare the meatballs and assemble the casserole earlier in the day. Cover and refrigerate until you’re ready to bake. If the casserole is very cold, it may require a little additional baking time.
Can I use frozen meatballs?
Yes, but check the ingredient and nutrition label if you’re following keto, since many commercial meatballs contain breadcrumbs, flour, or added sugars. Follow the package directions for cooking and then finish them in the casserole with the sauce and cheese.
Is this casserole actually keto?
It can fit a keto eating pattern, but the exact carbohydrate content depends on the marinara sauce, cheese, and portion size. For strict keto diets, check the labels of your ingredients and calculate the nutrition information based on the products you use.
Final Thoughts
This Cheesy Keto Meatball Casserole brings together everything you want in a cozy comfort-food dinner: tender meatballs, savory tomato sauce, and plenty of bubbling melted cheese. It’s simple enough for a weeknight meal but satisfying enough for a family dinner.
Skip the pasta, add your favorite low-carb side dishes, and enjoy a hearty meatball casserole that doesn’t feel like you’re missing anything.