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Cheesy Keto Meatball Casserole

Cheesy Keto Meatball Casserole

Cheesy Keto Meatball Casserole blends juicy beef meatballs with creamy ricotta and melty mozzarella for a rich, comforting weeknight dinner. The savory parmesan and aromatic garlic create layered flavor while a simple marinara keeps it saucy and satisfying. Easy to prep and perfect for winter evenings, this casserole gives you cheesy, saucy comfort that’s worth making tonight.
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Prep Time 15 minutes
Cook Time 40 minutes
Total Time 55 minutes
Course Dinner
Cuisine Italian
Servings 6 servings
Calories 450 kcal

Equipment

  • Oven
  • Baking Sheet
  • Large Bowl
  • Cookie Scoop
  • Baking Dish

Ingredients
  

  • 2 lb ground beef Provide rich, fatty flavor and structure to the meatballs while keeping them moist; browns nicely to add savory depth and forms the main protein base for the casserole.
  • 1/2 cup grated parmesan cheese Add a salty, nutty umami note and help bind the meat mixture; grating finely ensures even distribution and enhances overall savory complexity.
  • 3/4 cups shredded mozzarella cheese Melt into gooey, stretchy pockets that create classic cheesy pulls; shredding allows it to distribute throughout and top the casserole with a golden layer.
  • 1 egg Bind the meat mixture and help set the meatballs during baking; whisk lightly before adding to ensure even incorporation and improved texture.
  • 1/4 cup grated onion Contribute mild sweetness and moisture while softening during cooking; grating yields small pieces that integrate smoothly into the meat mixture for gentle onion flavor.
  • 3 garlic cloves, minced Impart pungent, aromatic depth and savory warmth; mincing releases more flavor and disperses evenly so each meatball has a garlicky kick.
  • 3 tablespoon chopped fresh parsley Provide fresh herbal brightness and a hint of peppery flavor; chopping releases oils that lift the overall freshness and balance the rich cheeses.
  • 1/2 teaspoon onion powder Deliver concentrated onion flavor without added moisture; measuring precisely helps maintain the intended savory profile without altering texture.
  • 1/2 teaspoon garlic powder Offer a mellow, roasted garlic taste that complements fresh garlic; powdered form seasons uniformly and strengthens the overall garlic presence.
  • 1/2 teaspoon Italian seasoning Introduce a balanced blend of herbs like oregano and basil for Italian flair; sprinkling evenly brings layered herbal notes that complement marinara and cheeses.
  • Salt and pepper, to taste Season to personal preference for balanced flavor; adjusting salt and pepper tailors the dish to taste and enhances all other ingredients.
  • 3 cups marinara sauce or 1 (24 oz) jar favorite marinara (I prefer Rao's) Provide a tangy tomato base and saucy moisture that ties the casserole together; using a jarred marinara offers convenience while simmering blends flavors into the meatballs.
  • 1/2 cup ricotta cheese Add creamy richness and a slightly sweet tang that lightens textures; spooning into the casserole creates pockets of soft, milky contrast to the beef.
  • 1/2 cup shredded mozzarella cheese Melt into additional cheesy layers for gooey texture and cohesive topping; using more shredded mozzarella ensures ample stretch and a golden finish.
  • 2 to 3 Tbsp fresh basil, chopped Finish with fresh herbal aroma and bright, peppery notes; chopping and sprinkling on top just before serving elevates presentation and freshness.

Instructions
 

  • Preheat oven to 400 degrees F.: When the oven reaches 400 degrees F , you should feel confident that baking will be even and predictable, which ensures the exterior of the meatballs browns while the interior cooks through. Listen for the faint hum of the heating element and notice the warm air when you open the door just enough to place a sheet inside. A common mistake is putting the meatballs into a cold oven, which can cause them to release more juice and become less browned. If your oven runs hot or cool, use an oven thermometer to verify the real temperature for consistent results.
  • To make the meatballs: In a large bowl combine ground beef, cheeses, egg, onion, garlic, parsley and seasonings, mixing well. Use a large cookie scoop to form the meatballs so they are all the same size, rolling them around in your hands, and arrange on a baking dish or cookie sheet. You should get about 15 to 16 large meatballs.: In a large bowl combine ground beef, cheeses, egg, onion, garlic, parsley and seasonings, mixing well. Use a large cookie scoop to form the meatballs so they are all the same size, rolling them around in your hands, and arrange on a baking dish or cookie sheet. : As you mix, you will notice the textures change; the parmesan cheese will feel granular and the egg will help bind everything. The aroma of fresh garlic and chopped parsley will lift from the bowl, promising flavor. Rolling meatballs with slightly damp hands prevents sticking, and uniform sizing helps them cook evenly so you get consistent doneness. A frequent error here is overmixing, which can make meatballs dense; mix just until ingredients are combined to keep them tender.
  • Bake meatballs for 20 to 25 minutes, or until fully cooked. Remove meatballs, draining any excess grease, and arrange cooked meatballs in a baking dish.: : During baking, the surface will change from raw pink to a deep brown, and you may hear gentle sizzling as fat renders. Check for a firm but slightly springy texture and an internal color change; if you have a thermometer aim for a safe temperature that matches the meat you used. Draining grease prevents the casserole from becoming oily, and arranging the meatballs in a single layer ensures even sauce coverage. Avoid opening the oven repeatedly, as that drops the temperature and prolongs cooking time.
  • Pour marinara sauce evenly over the meatballs and spoon ricotta cheese on top. Sprinkle with mozzarella cheese and bake in the oven for about 15 minutes until cheese is melted and bubbly.: The bright tomato scent of the marinara sauce will mingle with the meat as you ladle it over each meatball, and the dots of ricotta cheese will sit like little islands that soften and warm. The top mozzarella cheese will go from pale to glossy, then to lightly golden at the edges, creating that coveted bubbly finish. Watch for bubbling around the edges as the cue that the casserole is hot throughout. One mistake to avoid is using too much sauce which can drown the texture; aim for even coverage so you still taste the meatballs through the sauce.
  • Remove from oven and top with fresh basil. Serve and enjoy!: Serve and enjoy! : Once out of the oven the dish should smell fragrant, with the herbal perfume of chopped basil brightening the rich, cheesy aroma. The surface will be glossy and slightly blistered, and spooning into the casserole will reveal the tender meatballs in saucy pockets. Let it rest briefly so the cheeses settle; serving too quickly can cause the sauce to be runny and the cheese to slide off. A small slip to avoid is skipping the rest period, which can lead to soupy portions instead of nicely portioned servings.

Notes

  • Binders matter: Use the specified amount of egg to keep the meatballs tender but intact; too little and they can fall apart, too much and they become firm.
  • Cheese distribution: Reserve some mozzarella cheese for the top so the interior stays creamy while the top crisps and bubbles attractively.
  • Even sizing: A large cookie scoop yields uniform meatballs that cook at the same rate, preventing overcooked edges and underdone centers.
  • Fresh herbs last: Add chopped basil at the end to preserve its bright aroma and avoid browning from oven heat.
  • Sauce balance: Spread the marinara sauce evenly but sparingly so the casserole is saucy without becoming wet, which preserves textural contrast.
Keyword cheesy keto dinner, easy weeknight casserole, keto meatball casserole, low carb meatballs