Slow Cooker Cheesy Meatballs

These Slow Cooker Cheesy Meatballs are the ultimate comfort food, featuring tender, juicy meatballs slow-cooked in a rich marinara sauce and finished with plenty of gooey melted mozzarella. Every bite is packed with savory Italian-inspired flavors, making this recipe perfect for family dinners, game day appetizers, potlucks, or easy weeknight meals. The slow cooker allows the meatballs to simmer gently, soaking up the delicious tomato sauce while remaining incredibly moist and flavorful. Topped with bubbling cheese just before serving, these meatballs are irresistible over pasta, creamy mashed potatoes, rice, or tucked into toasted hoagie rolls for unforgettable meatball subs. Best of all, this recipe requires very little hands-on time, making it ideal for busy schedules while still delivering a homemade meal everyone will love.

Ingredients For the Meatballs

• 2 pounds lean ground beef (or half beef, half Italian sausage)
• 1 cup Italian-style breadcrumbs
• ½ cup grated Parmesan cheese
• 2 large eggs
• 3 cloves garlic, minced
• 2 tablespoons chopped fresh parsley
• 1 teaspoon Italian seasoning
• 1 teaspoon onion powder
• 1 teaspoon garlic powder
• 1 teaspoon salt
• ½ teaspoon black pepper

For the Sauce

• 2 (24-ounce) jars marinara sauce
• 1 tablespoon Italian seasoning
• 1 teaspoon crushed red pepper flakes (optional)

For the Cheese Topping

• 2 cups shredded mozzarella cheese
• ¼ cup grated Parmesan cheese

Optional Garnishes

• Fresh basil
• Chopped parsley
• Extra Parmesan cheese

Instructions

1. In a large mixing bowl, combine the ground beef, breadcrumbs, Parmesan cheese, eggs, minced garlic, parsley, Italian seasoning, onion powder, garlic powder, salt, and black pepper.
2. Mix gently until everything is just combined. Avoid overmixing to keep the meatballs tender.
3. Roll the mixture into about 24 evenly sized meatballs, approximately 1½ inches each.
4. Heat a large skillet over medium-high heat and lightly brown the meatballs on all sides for 2–3 minutes. They do not need to cook through completely.
5. Pour a thin layer of marinara sauce into the bottom of the slow cooker.
6. Arrange the browned meatballs in the slow cooker.
7. Pour the remaining marinara sauce over the meatballs and sprinkle with the Italian seasoning and crushed red pepper flakes if using.
8. Cover and cook on LOW for 5–6 hours or HIGH for 2½–3 hours, until the meatballs are fully cooked and tender.
9. During the final 20 minutes of cooking, sprinkle the mozzarella and Parmesan cheeses evenly over the top.
10. Cover again and continue cooking until the cheese is completely melted, bubbly, and gooey.
11. Let the meatballs rest for about 5 minutes before serving.
12. Garnish with fresh basil, chopped parsley, and extra Parmesan cheese.
13. Serve over spaghetti, fettuccine, mashed potatoes, rice, zucchini noodles, or inside toasted sub rolls for cheesy meatball sandwiches.

Tips, Notes & Q&A

Can I use frozen meatballs?
Yes! Simply place fully cooked frozen meatballs directly into the slow cooker, pour the sauce over them, and cook on LOW for 4–5 hours or HIGH for 2–3 hours before adding the cheese.

Can I make this ahead of time?
Absolutely. Prepare and brown the meatballs a day in advance, then refrigerate them. Assemble everything in the slow cooker when you’re ready to cook.

Can I use different cheeses?
Definitely. Provolone, Monterey Jack, Fontina, or an Italian cheese blend all melt beautifully and add delicious flavor.

How do I store leftovers?
Store cooled meatballs in an airtight container in the refrigerator for up to 4 days. Reheat gently in the microwave or on the stovetop until hot.

Can I freeze them?
Yes. Freeze cooked meatballs with the sauce (without the cheese topping) for up to 3 months. Thaw overnight in the refrigerator, reheat, then add fresh cheese before serving.

Servings & Nutrition

Servings: 6
Approximate Nutrition (Per Serving):

• Calories: 485
• Protein: 35g
• Carbohydrates: 15g
• Fat: 31g
• Saturated Fat: 12g
• Fiber: 2g
• Sugar: 6g
• Sodium: 890mg
• Cholesterol: 145mg