Slow Cooker Italian Meatballs (in Marinara)
Made with ground beef, parmesan, and breadcrumbs, these slow cooker meatballs simmer low and slow in marinara sauce for tender, juicy, melt-in-your-mouth meatballs the whole family will love. A dump-and-go weeknight dinner that comes together with zero pre-browning required!

5 star review
“I think these meatballs are insanely delicious and so practical for a full time working parent. Thank you for this yumminess!”
– Steph
My Favorite Easy Crockpot Meatballs!
These slow cooker Italian meatballs deliver everything you want from a classic spaghetti-and-meatballs dinner without any of the pre-browning or stove-time (we LOVE that!). Mix the meatballs in a single bowl, nestle them into marinara in the slow cooker, and a few hours later you have a tender, juicy, melt-in-your-mouth meatball dinner that tastes like it came out of your Italian grandma’s kitchen!
Two small steps I use to make these noticeably better than the average dump-and-go meatball. First, we’re grating the onion instead of dicing it; as the juices melts straight into the meat mixture and keeps the meatballs seasoned all the way through. And go light with the mixing, since overworking the meat is the fastest way to dense meatballs! The other thing that matters is the marinara itself; great sauce means great dinner, and a bland jar produces a bland result. My homemade marinara sauce is my go-to, but any good quality jarred marinara works, too.
Serve these meatballs over spaghetti (this recipe makes enough for a pound of cooked pasta), with a generous shower of parmesan and fresh basil on top. My time-saving garlic bread on the side rounds out the full Italian dinner in the easiest way possible. The meatballs keep in the fridge for 3 to 4 days and freeze beautifully for up to 3 months, too!
Welcome to My Kitchen, Here’s How to Make Crock Pot Italian Meatballs







Testing Tips for Crockpot Meatballs in Marinara
- To work ahead, do what one of my readers, Allison, did and form the meatballs the night before, refrigerate them on a parchment-lined plate, then drop them straight into the slow cooker with the marinara in the morning. Cold meatballs from the fridge work perfectly in the slow cooker, and there is no need to bring them to room temperature first.
- To double this recipe, scale all ingredients to 48 meatballs and 6 cups of marinara, then cook in a 6-quart or larger slow cooker with at least 2 inches of clearance between the meatballs and the lid. Add an extra 30 to 60 minutes to the cook time on either low or high since the fuller slow cooker takes longer to come to temperature.
- To make these meatballs gluten free, swap in your favorite gluten-free Italian breadcrumbs (Aleia’s works well) in the same 1/3 cup amount called for in the recipe. The texture is identical to the original, and the meatballs hold together beautifully throughout the long simmer in the marinara.


Slow Cooker Italian Meatballs (in Marinara)
Ingredients
- 1 small yellow onion, ends removed and peeled
- 1 large egg
- 2 cloves garlic, minced
- ⅓ cup Italian breadcrumbs
- ⅓ cup finely grated parmesan cheese
- 1 teaspoon kosher salt
- ¼ teaspoon freshly ground black pepper
- 1 ½ pounds 90% lean ground beef
- 3 cups marinara sauce
Equipment
Instructions
- Place a box grater into a large bowl. Using the largest holes, grate the onion into the bowl.
- Add the egg to the bowl, and whisk until combined. Add the garlic, breadcrumbs, parmesan, salt, pepper and mix well.
- Add the ground beef and gently mix until the breadcrumb-cheese mixture is well incorporated, being careful not to overmix.
- Gently form 24 meatballs (about 1 ½ ounces each).
- Pour half (1 ½ cups) marinara into a 6-quart slow cooker.
- Gently layer the meatballs into the sauce so they are all in a single layer in the bottom of the slow cooker.
- Pour the remaining (1 ½ cups) marinara over the top. Do not mix or the meatballs could fall apart.
- Cover and cook on high for 3-4 hours, or low for 6-8 hours, or until the meatballs are cooked through and every tender.
- Serve with fresh basil and freshly grated parmesan cheese, over cooked spaghetti or pasta if that's your thing.
Notes
- For a more traditional Italian meatball, swap half the ground beef for ground pork, or mild Italian sausage works in place of plain ground pork, too.
- For perfect spaghetti with these meatballs, bring 4 to 6 quarts of well-salted water to a rolling boil, add the 1 pound of spaghetti, and stir immediately to prevent clumping; cook to al dente per package directions (usually 9 to 11 minutes). Reserve 1/2 cup of pasta water before draining, then toss the spaghetti directly in the slow cooker marinara with that splash of starchy water to help the sauce coat every strand. YUM!
- Use gluten free breadcrumbs for a gluten free diet.




These came out great. Simple and easy to pull together. I made the meatballs the night before then put them in the slow cooker with sauce the next morning. Served with polenta cakes and mozzarella
Woohoo, so happy to hear this one was a hit for you, Allison. Thanks so much for taking the time to leave a review!
I have not been Italian my whole life and I think these meatballs are insanely delicious and so practical for a full time working parent. Thank you for this yumminess!
Steph, LOL! I’m so happy these meatballs are a hit for you! Thanks so much for taking the time to leave a review.
I have not been Italian my entire life and this recipe is so simple and delicious. It’s also wildly practical for a full time working parent! Highly recommend
Can the recipe be doubled and cooked in the slow cooker all together? Like 50 meatballs? If so for how long and high or low?
Hi Susan, as long as the meatballs and marinara fit in the slow cooker with at least 2-inches of clearance between the meatballs and the lid you should be fine to double. You don’t need to double the cook time, but likely add an extra 30-60 minutes to the time directed (either low or high) since it will take the slow cooker a bit more time to come to temperature since it will be fuller. If you give it a try let me know how it turns out!
Made 1 1/2 times this recipe for our dinner plus a friend’s meal train post surgery. The sauce was a little thin so I boiled in (was using my instant pot) and added a little tomato paste. Perfect with a green salad, homemade sourdough, and noodles. Thank you!
Natalie, sounds lovely with salad and homemade sourdough, yum! So happy to hear this one was a hit, thanks for sharing your thoughts and leaving a review!
Made this again tonight! So easy and delicious. House smelled good all afternoon! Loving the cookbook!
Pam, yay, I’m so happy you enjoyed this recipe and my cookbook! I so appreciate your kind words, thank you!