Slow Cooker Meatballs with Marinara Sauce Recipe

Make the best Slow Cooker Meatballs with homemade marinara using this easy Crock Pot recipe. Juicy Italian meatballs simmer in a fragrant tomato sauce and can be combined with pasta right in the slow cooker for a hands-off, family-friendly meal. Toss everything into the slow cooker in the morning and come home to a comforting dinner with minimal cleanup.

I perfected my classic homemade meatball recipe over time to create tender, juicy meatballs with bold flavor. This slow cooker version keeps that same satisfying texture and boosts convenience: the sauce and meatballs simmer together until everything is perfectly infused with garlic, herbs and tomatoes. For best results, I recommend a quick five-minute broil on the meatballs before adding them to the slow cooker to help them hold their shape. The broil step is optional but prevents the meatballs from sticking together or falling apart during a long, gentle simmer.

Ingredients

For the marinara sauce

• San Marzano whole peeled tomatoes – two 28-ounce cans (or any high-quality whole tomatoes). Use the can juices; do not drain.
• Garlic cloves – fresh, crushed for best flavor.
• Dried oregano – adds classic Italian herb notes.
• Sugar – helps balance tomato acidity.
• Salt – for seasoning and balance.
• Red pepper flakes – optional, for a touch of heat.
• Fresh basil leaves – stirred in at the end for brightness.

For the meatballs

• Onions – finely chopped so they cook down in the slow cooker.
• Garlic – crushed or finely minced.
• Ground beef – 80/20 blend recommended for tender, juicy meatballs.
• Loose Italian pork sausage – remove from casings if using links.
• Panko breadcrumbs – for structure and light texture.
• Parmesan cheese – freshly grated for best flavor.
• Egg yolks – bind the mixture (you can reserve the whites for another use).
• Italian seasoning – a balanced blend of dried herbs.
• Kosher salt and black pepper – to taste.

Instructions

Below are clear, step-by-step directions for assembling and cooking the marinara and meatballs in the slow cooker. The optional step of briefly broiling the meatballs helps them hold together during long cooking.

1. Make the marinara: Pour unopened cans of whole tomatoes (including juices) into the slow cooker. Crush the tomatoes by hand until mostly broken up, leaving some small chunks for texture. Add crushed garlic, dried oregano, sugar, salt and red pepper flakes. Stir to combine.
2. Mix the meatball ingredients: In a large bowl combine the ground beef, loose Italian pork sausage, finely chopped onions, crushed garlic, panko breadcrumbs, grated Parmesan, egg yolks, Italian seasoning, salt and pepper. Gently mix until just combined — do not overwork the meat.
3. Shape the meatballs: Form the mixture into about 40 golf ball–sized meatballs. Keeping the meatballs a consistent size helps them cook evenly.
4. Optional but recommended — broil briefly: Line a baking sheet with foil and place meatballs under a high broiler for 4–6 minutes to brown the outsides slightly. This quick step firms them up and reduces the chance they’ll fall apart in the slow cooker.
5. Cook in the slow cooker: Gently nestle the meatballs into the marinara so they’re coated in sauce. Cover and cook on low for 6–8 hours or on high for 3–4 hours.
6. Finish with basil: Stir in 1/2 cup fresh chopped basil at the end of cooking to brighten the sauce.
7. Optional — cook pasta in the slow cooker: If you’d like to cook the spaghetti directly in the sauce, add 8 ounces of uncooked spaghetti and press it down so it’s submerged. Break the noodles if needed to fit. Cook on low for 30–40 minutes or on high for 25–30 minutes, checking for doneness. Note: noodles cooked in the sauce will release starch, slightly thickening the marinara.
8. Serve: Spoon meatballs and sauce over pasta or serve with pasta mixed in. Top with fresh grated Parmesan and extra basil if desired.