Simple Crockpot Meatballs in Marinara

I didn’t discover the magic of crockpot meatballs until I had two kids running around and realized I couldn’t stand at the stove for an hour anymore. Before that, I’d spend my Sunday afternoons rolling meatballs, browning them in batches, and standing guard so they wouldn’t burn. It was exhausting.

Then one day I thought, why not just throw everything in the slow cooker? Turns out, meatballs don’t need to be browned first—they cook up just fine simmering away in marinara sauce all day. The crockpot does all the work while you’re doing literally anything else. No hovering, no stirring, no stress.

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What Kind of Ground Beef Should I Use?

For crockpot meatballs, you’ll want to use ground beef with a fat content between 80/20 and 85/15 for the best results. The fat helps keep your meatballs moist and flavorful during the long, slow cooking process in the crockpot. If you go too lean, like 90/10 or higher, your meatballs might end up a bit dry and less tasty. You can also mix ground beef with ground pork or Italian sausage if you want to add extra flavor, which is a trick a lot of Italian cooks use. Just make sure your meat is fresh and not previously frozen if possible, as it will hold together better when you’re forming the meatballs.

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Options for Substitutions

This meatball recipe is pretty forgiving, so here are some swaps you can make:

• Ground beef: You can use ground turkey, ground pork, or a mix of beef and pork for different flavor profiles. Ground turkey will make lighter meatballs, while adding pork gives you extra moisture and richness.
• Breadcrumbs: Crushed crackers, panko, or even rolled oats work well here. If you’re going gluten-free, try almond flour or gluten-free breadcrumbs – just use the same amount.
• Parmesan: Pecorino Romano is a great substitute with a similar salty, sharp flavor. You could also use grated Asiago if that’s what you have on hand.
• Egg: If you’re out of eggs, try 3 tablespoons of milk or 2 tablespoons of plain yogurt as a binder instead.
• Marinara sauce: Any tomato-based pasta sauce works fine – whether it’s store-bought or homemade. You can even use crushed tomatoes with some Italian seasoning added in.
• Fresh basil: Dried basil works too – just use about 1 teaspoon instead of fresh. You can also try fresh parsley or oregano for a slightly different taste.

Watch Out for These Mistakes While Cooking

The biggest error people make with crockpot meatballs is overmixing the meat mixture, which creates dense, tough meatballs instead of tender ones – mix just until the ingredients are combined and handle the meat gently when forming the balls.

Another common mistake is making your meatballs too large, so aim for golf ball-sized portions (about 1.5 tablespoons each) to ensure they cook through evenly in the time given.

Resist the urge to stir the meatballs during cooking, as this can break them apart and turn your sauce cloudy – they’ll cook perfectly fine sitting in the sauce undisturbed.

Finally, if your meatballs seem to be releasing too much grease, you can carefully tilt the slow cooker and spoon off excess fat about halfway through cooking for a cleaner-tasting sauce.

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What to Serve With Crockpot Meatballs?

These meatballs are perfect served over a big bowl of spaghetti or your favorite pasta shape like rigatoni or penne, which catches all that delicious marinara sauce. If you’re not in the mood for pasta, try piling them onto a toasted hoagie roll with melted mozzarella for an amazing meatball sub. A simple side salad with Italian dressing and some garlic bread on the side makes this a complete meal that everyone will love. You can also serve these meatballs over creamy polenta or mashed potatoes if you want to switch things up from the usual pasta routine.

Storage Instructions

Store: These meatballs are perfect for meal prep! Keep them in an airtight container with the marinara sauce in the fridge for up to 4 days. They actually taste even better the next day once all those flavors have had time to mingle together.

Freeze: You can freeze these meatballs for up to 3 months, either with the sauce or without. I like to freeze them on a baking sheet first, then transfer to a freezer bag so they don’t stick together. That way you can grab just what you need for a quick dinner.

Reheat: Warm them up gently on the stovetop over medium-low heat, stirring occasionally until heated through. You can also microwave individual portions, but I find the stovetop keeps them from drying out. Add a splash of water or extra marinara if the sauce seems too thick.

Estimated Nutrition

Estimated nutrition for the whole recipe (without optional ingredients):

• Calories: 1700-1900
• Protein: 110-120 g
• Fat: 105-115 g
• Carbohydrates: 60-70 g

Ingredients

For the meatballs:

• 1 medium onion
• 1 large egg
• 3 garlic cloves, minced
• 1/3 cup breadcrumbs
• 1/3 cup Parmesan cheese, grated
• 1.25 tsp salt
• 1/2 tsp black pepper
• 1.5 lb ground beef (80/20 lean for juicy meatballs)
• 1/2 tsp dried oregano

For the slow cooker:

• 3 cups marinara sauce (I like Rao’s Homemade Marinara Sauce)

For Toppings (optional):

• Parmesan cheese
• fresh basil (finely chopped for garnish)

Step 1: Prepare the Meatball Mixture

• 1 medium onion, grated
• 1 large egg
• 3 garlic cloves, minced
• 1/3 cup breadcrumbs
• 1/3 cup Parmesan cheese, grated
• 1.25 tsp salt
• 1/2 tsp black pepper
• 1/2 tsp dried oregano
• 1.5 lb ground beef

Grate the medium onion directly into a large mixing bowl to release its juices, which will keep the meatballs moist.

Whisk in the egg until well combined, then add the minced garlic, breadcrumbs, grated Parmesan, salt, pepper, and dried oregano.

Mix these ingredients together until evenly distributed.

Add the ground beef last and fold it in gently with your hands until just combined—overmixing will make the meatballs dense and tough.

I prefer to use 80/20 ground beef because the extra fat renders during cooking, keeping the meatballs tender and flavorful rather than dry.

Step 2: Form the Meatballs

• meatball mixture from Step 1

Using damp hands (this prevents sticking), portion the mixture into 24 equal meatballs, roughly the size of a golf ball.

Work quickly and gently—overhandling will compress them and result in tough meatballs.

Place the formed meatballs on a clean surface or plate as you work.

I find that making them slightly undersized allows them to cook more evenly in the slow cooker.

Step 3: Layer the Meatballs and Sauce in the Slow Cooker

• formed meatballs from Step 2
• 3 cups marinara sauce

Pour 1½ cups of marinara sauce into the bottom of your slow cooker, creating an even base layer.

Arrange all 24 meatballs in a single layer on top of this sauce—avoid stacking them so they cook evenly.

Pour the remaining 1½ cups of marinara sauce over the top without stirring or mixing.

This layering technique keeps the meatballs from sticking to the bottom and ensures they stay moist and tender throughout cooking.

Step 4: Cook the Meatballs

Cover the slow cooker and cook on high for 3-4 hours or on low for 6-8 hours.

The meatballs are done when they’re cooked through and have absorbed the flavors of the sauce.

The longer, low-temperature cooking method yields more tender meatballs with better flavor development, so choose that option if you have the time.

Step 5: Finish and Serve

• cooked meatballs and sauce from Step 4
• Parmesan cheese
• fresh basil, finely chopped

Transfer the meatballs and sauce to a serving dish or keep warm in the slow cooker on the warm setting.

Sprinkle with freshly grated Parmesan cheese and garnish with fresh basil.

Serve immediately over pasta, polenta, or with crusty bread for soaking up the sauce.

Simple Crockpot Meatballs in Marinara

Delicious Simple Crockpot Meatballs in Marinara recipe with step-by-step instructions.

Print Recipe Pin Recipe

Prep Time 1 hour hr 15 minutes mins

Cook Time 2 hours hrs 35 minutes mins

Total Time 3 hours hrs 50 minutes mins

Servings 8 servings

Calories 1800 kcal

Ingredients

  

For the meatballs::

• 1 medium onion
• 1 large egg
• 3 garlic cloves, minced
• 1/3 cup breadcrumbs
• 1/3 cup Parmesan cheese, grated
• 1.25 tsp salt
• 1/2 tsp black pepper
• 1.5 lb ground beef (80/20 lean for juicy meatballs)
• 1/2 tsp dried oregano

For the slow cooker::

• 3 cups marinara sauce (I like Rao's Homemade Marinara Sauce)

For Toppings (optional):

• Parmesan cheese
• fresh basil (finely chopped for garnish)

Instructions

 

• Grate the medium onion directly into a large mixing bowl to release its juices, which will keep the meatballs moist. Whisk in the egg until well combined, then add the minced garlic, breadcrumbs, grated Parmesan, salt, pepper, and dried oregano. Mix these ingredients together until evenly distributed. Add the ground beef last and fold it in gently with your hands until just combined—overmixing will make the meatballs dense and tough. I prefer to use 80/20 ground beef because the extra fat renders during cooking, keeping the meatballs tender and flavorful rather than dry.
• Using damp hands (this prevents sticking), portion the mixture into 24 equal meatballs, roughly the size of a golf ball. Work quickly and gently—overhandling will compress them and result in tough meatballs. Place the formed meatballs on a clean surface or plate as you work. I find that making them slightly undersized allows them to cook more evenly in the slow cooker.
• Pour 1½ cups of marinara sauce into the bottom of your slow cooker, creating an even base layer. Arrange all 24 meatballs in a single layer on top of this sauce—avoid stacking them so they cook evenly. Pour the remaining 1½ cups of marinara sauce over the top without stirring or mixing. This layering technique keeps the meatballs from sticking to the bottom and ensures they stay moist and tender throughout cooking.
• Cover the slow cooker and cook on high for 3-4 hours or on low for 6-8 hours. The meatballs are done when they're cooked through and have absorbed the flavors of the sauce. The longer, low-temperature cooking method yields more tender meatballs with better flavor development, so choose that option if you have the time.
• Transfer the meatballs and sauce to a serving dish or keep warm in the slow cooker on the warm setting. Sprinkle with freshly grated Parmesan cheese and garnish with fresh basil. Serve immediately over pasta, polenta, or with crusty bread for soaking up the sauce.