These Slow Cooker Italian Meatballs are tender, juicy, and packed with simple Italian flavor. The meatballs cook right in the tomato sauce, so they soak up flavor while the slow cooker does most of the work. They are great with pasta, tucked into a sandwich, or served with warm bread.
Servings: 6
Prep Time: 25 minutes
Cook Time: 4 hours on HIGH or 6–8 hours on LOW
Total Time: About 4 hours 25 minutes on HIGH
Why I Love This Recipe
This is the kind of dinner I love making when I want something warm and homemade without standing over the stove all afternoon. Once the meatballs are shaped and the sauce is mixed, the slow cooker takes care of the rest.
The best part is what happens while the meatballs cook. Their juices mix with the tomato sauce, while the sauce keeps the meatballs moist. By dinner time, the kitchen smells like a pot of sauce has been simmering all day.
- The meatballs stay tender and juicy.
- There is no need to fry the meatballs first.
- Everything cooks in one slow cooker.
- The tomato sauce gets richer as it cooks.
- You can serve the meatballs in several different ways.
- Leftovers taste great the next day.
What You’ll Need
For the Italian Meatballs
- 1 pound ground beef, 85% lean
- 1/2 pound ground pork
- 1/2 cup plain breadcrumbs
- 1/2 cup finely grated Parmesan cheese
- 1/4 cup whole milk
- 1 large egg
- 2 tablespoons finely chopped fresh parsley
- 3 cloves garlic, minced
- 1/4 cup onion, very finely diced
- 1 teaspoon Italian seasoning
- 1 teaspoon salt
- 1/2 teaspoon black pepper
For the Tomato Sauce
- 1 can (28 ounces) crushed tomatoes
- 1 can (15 ounces) tomato sauce
- 2 tablespoons tomato paste
- 2 cloves garlic, minced
- 1 teaspoon Italian seasoning
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
- 1 teaspoon granulated sugar, optional
For Serving
- 2 tablespoons finely grated Parmesan cheese
- 1 tablespoon finely chopped fresh parsley
How to Make Slow Cooker Italian Meatballs
Step 1: Mix the Tomato Sauce
Pour 1 can (28 ounces) crushed tomatoes, 1 can (15 ounces) tomato sauce, and 2 tablespoons tomato paste into the black oval crockpot. Add 2 cloves minced garlic, 1 teaspoon Italian seasoning, 1/2 teaspoon salt, 1/4 teaspoon black pepper, and 1 teaspoon granulated sugar, if using. Stir until the tomato paste is fully mixed into the sauce.
Step 2: Make the Meatball Mixture
In a large mixing bowl, add 1 pound ground beef, 1/2 pound ground pork, 1/2 cup plain breadcrumbs, 1/2 cup finely grated Parmesan cheese, 1/4 cup whole milk, 1 large egg, 2 tablespoons finely chopped fresh parsley, 3 cloves minced garlic, 1/4 cup very finely diced onion, 1 teaspoon Italian seasoning, 1 teaspoon salt, and 1/2 teaspoon black pepper.
Use clean hands to gently mix everything just until combined. Do not squeeze or pack the meat too much. Overmixing can make the meatballs firm instead of tender.
Step 3: Shape the Meatballs
Divide the meat mixture into about 18 equal meatballs, using roughly 2 tablespoons of meat mixture for each one. Roll them gently between your palms. Do not press them tightly.
Step 4: Add the Meatballs to the Slow Cooker
Place all 18 raw meatballs gently into the prepared tomato sauce. Arrange them in an even layer as much as possible. Spoon a little sauce over the tops.
Do not stir hard after adding them. The meatballs are still soft and can break apart before they cook.
Step 5: Slow Cook
Put the lid on the black oval crockpot. Cook the 18 meatballs in the prepared tomato sauce on LOW for 6–8 hours or HIGH for about 4 hours.
The meatballs are ready when they are cooked through and the center reaches 160°F (71°C) for this beef-and-pork mixture.
Step 6: Finish and Serve
Place the hot meatballs and tomato sauce in a round white serving bowl. Sprinkle the top with 2 tablespoons finely grated Parmesan cheese and 1 tablespoon finely chopped fresh parsley. Serve right away.
Why This Recipe Works (Quick Science)
Ground pork brings extra fat to the mixture, which helps keep the meatballs moist. Milk soaks into the breadcrumbs and creates what cooks call a panade. This holds moisture inside the meatballs as they cook.
The egg helps bind everything together, while Parmesan adds both salt and savory flavor. Gentle mixing also matters. Working ground meat too much makes its proteins tighten, which can give you dense meatballs.
Slow cooking gives the meatballs time to cook gently while their juices flavor the tomato sauce. At the same time, the sauce surrounds the meatballs and helps protect them from drying out.
Pro Tips
- Mix gently. Stop as soon as the meat mixture comes together.
- Keep the meatballs even. A 2-tablespoon cookie scoop makes portioning much easier.
- Dice the onion very small. Large onion pieces can make the meatballs harder to shape.
- Do not stir right away. Raw meatballs are delicate. Let them cook and firm up first.
- Check the temperature. The centers should reach 160°F (71°C).
Tools You’ll Need
- 6-quart black oval crockpot
- Large mixing bowl
- Medium bowl or measuring bowl
- Measuring cups
- Measuring spoons
- Chef’s knife
- Cutting board
- Garlic press or sharp knife
- Wooden spoon
- 2-tablespoon cookie scoop, optional
- Instant-read meat thermometer
- Serving spoon
- Round serving bowl
Substitutions and Variations
- All beef: Replace the 1/2 pound ground pork with another 1/2 pound ground beef.
- Ground turkey: Ground turkey can replace the beef and pork, but the meatballs may be a little leaner.
- Gluten-free: Use gluten-free breadcrumbs.
- No milk: Use unsweetened plain dairy-free milk.
- More heat: Add 1/4 teaspoon crushed red pepper flakes to the sauce.
- More herbs: Add fresh chopped basil before serving.
- Cheesy center: Press a small cube of mozzarella into the center of each meatball before shaping.
Common Mistakes
- Overmixing the meat: This can make meatballs tough and dense.
- Packing the meatballs too tightly: Shape them gently so they stay tender.
- Making different sizes: Small meatballs can overcook before large ones are ready.
- Stirring raw meatballs in the sauce: They may fall apart. Place them in gently instead.
- Using very lean meat: A little fat gives meatballs better flavor and texture.
- Opening the lid often: Each time the lid comes off, the slow cooker loses heat and cooking can take longer.
Make-Ahead Tips
You can shape the raw meatballs up to 24 hours ahead. Cover them well and keep them in the refrigerator.
You can also mix the tomato sauce a day ahead and refrigerate it in a separate covered container. Add the cold sauce and meatballs to the crockpot when you are ready to cook.
For longer storage, freeze the shaped raw meatballs on a baking sheet until firm, then transfer them to a freezer-safe bag for up to 3 months. Thaw them overnight in the refrigerator before slow cooking.
What to Serve With Slow Cooker Italian Meatballs
- Spaghetti or another favorite pasta
- Garlic bread
- Creamy polenta
- Mashed potatoes
- Roasted vegetables
- Steamed green beans
- A simple green salad
- Meatball subs with melted mozzarella or provolone
Leftovers and Storage
Let leftover meatballs and sauce cool, then place them in an airtight container. Store them in the refrigerator for up to 4 days.
Reheat meatballs with plenty of sauce in a covered saucepan over low heat or in the microwave until steaming hot throughout.
For longer storage, freeze cooked meatballs in their sauce in a freezer-safe container for up to 3 months. Thaw overnight in the refrigerator before reheating.
Macros Information
Approximate nutrition per serving, based on 6 servings and not including pasta, bread, or other sides:
- Calories: 440
- Protein: 30 g
- Carbohydrates: 24 g
- Fat: 25 g
- Fiber: 5 g
- Sugar: 11 g
Nutrition will change depending on the exact brands and meat you use.
FAQ
Q: Do I need to brown the meatballs first?
A: No. These meatballs can go straight into the sauce. Browning can add extra roasted flavor, but it is not required.
Q: Can I cook these meatballs on LOW?
A: Yes. Cook them on LOW for 6–8 hours. This is a great choice when you want to start dinner earlier in the day.
Q: Can I cook them on HIGH?
A: Yes. They should take about 4 hours on HIGH. Check that the centers reach 160°F (71°C).
Q: Why are my meatballs tough?
A: The meat was probably mixed or packed too firmly. Handle the mixture gently and stop mixing once everything is combined.
Q: Why did my meatballs fall apart?
A: They may have been stirred before they had time to firm up. The egg and breadcrumbs also need to be measured correctly because they help bind the mixture.
Q: Can I put frozen raw meatballs straight into the slow cooker?
A: It is better to thaw raw meatballs safely in the refrigerator first so they heat through at a safe and even rate.
Q: Can I make meatball subs with these?
A: Yes. Spoon the meatballs and a little sauce into toasted rolls, add mozzarella or provolone, and melt the cheese before serving.
Final Thoughts
Slow Cooker Italian Meatballs are simple comfort food with very little hands-on cooking. You get tender meatballs, a rich tomato sauce, and plenty of ways to turn them into a full meal.
Make a batch for pasta night, pile them into sandwiches, or freeze some for another dinner. If you try the recipe, leave a comment and share how your meatballs turned out. Your questions and favorite ways to serve them are always welcome!