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Slow Cooker Italian Meatballs

Slow Cooker Italian meatballs in tomato sauce over spaghetti with Parmesan.

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Tender, flavorful meatballs simmered in a rich marinara sauce in your slow cooker. This hands-off recipe delivers classic Italian comfort with minimal effort, perfect for busy weeknights or feeding a crowd.

Ingredients

Scale
  • For the Meatballs:
  • 2 lbs ground beef (85/15 blend)
  • 1 cup Italian-style breadcrumbs
  • 2 large eggs, lightly beaten
  • 1/2 cup grated Parmesan cheese
  • 1/2 cup whole milk
  • 1/4 cup finely chopped fresh parsley
  • 4 cloves garlic, minced
  • 2 tsp dried oregano
  • 1 tsp dried basil
  • 1 tsp onion powder
  • 1 tsp kosher salt
  • 1/2 tsp freshly ground black pepper
  • For the Sauce:
  • 2 (24 oz) jars marinara sauce
  • 1 (14.5 oz) can diced tomatoes, undrained
  • 1 small yellow onion, finely diced
  • 3 cloves garlic, minced
  • 1 tbsp Italian seasoning
  • 1 tsp granulated sugar (optional)
  • Salt and pepper to taste
  • 1 tbsp olive oil (optional, for browning)

Instructions

  1. In a large bowl, combine all meatball ingredients: ground beef, breadcrumbs, eggs, Parmesan, milk, parsley, garlic, oregano, basil, onion powder, salt, and pepper. Mix gently with hands just until combined; do not overmix.
  2. Lightly moisten hands with water or oil. Scoop about 2 tablespoons of mixture and roll into 1.5-inch balls. Place on a parchment-lined baking sheet. Should yield 24-28 meatballs.
  3. Optional Browning: Heat olive oil in a large skillet over medium-high heat. Brown meatballs in batches for 1-2 minutes per side to develop a crust. Transfer to slow cooker.
  4. In the slow cooker, combine marinara sauce, diced tomatoes with juices, diced onion, minced garlic, Italian seasoning, and sugar. Stir well.
  5. Gently nestle the meatballs (browned or raw) into the sauce. Spoon a little sauce over the top of each.
  6. Cover and cook on LOW for 4 hours or on HIGH for 2 hours, until meatballs are cooked through and tender.
  7. Carefully stir the sauce. Serve meatballs and sauce over pasta, polenta, or in sandwiches. Garnish with extra parsley and Parmesan.

Notes

For tender meatballs, avoid overmixing the meat. Browning adds flavor but is optional. The recipe is easily adapted: use gluten-free breadcrumbs, ground turkey, or dairy-free alternatives. Leftovers freeze well for up to 3 months.

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