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There’s no need to heat up your oven or turn on your stove for these easy and healthy Slow Cooker Mozzarella-Stuffed Meatballs! While this delicious comfort food may look rich and cheesy, it’s actually a clean eating dinner that’s full of protein and vegetables for a nutritious and family-friendly dinner!

Mozzarella stuffed meatballs on a plate with cheese oozing out

I know that it might seem a little bit crazy to be sharing a hearty and cozy meatball recipe in the middle of the summer, BUT…listen up! This is actually a lightened-up recipe that’s perfect for bathing suit season AND the meatballs and the sauce cook entirely in the slow cooker…meaning you don’t even have to heat up your oven on a hot day! Pretty genius, right?

I actually can’t take all of the credit for this particular recipe. A very sweet reader named Julie shared it with me via email a few months ago after creating it for her fiancee. I tweaked Julie’s original recipe to make it even easier (I didn’t want to have to bake the meatballs or turn on a skillet before using the Crock Pot, and I lightened it up with some lean meat and loads of fresh veggies).

How to Stuff the Meatballs with Mozzarella

To stuff the meatballs you need to mix all the ingredients together to make the meatballs apart from the mozzarella. To do this put everything in a bowl and gently massage everything together using your hands.

Pick up a small amount of meatball mixture, flatten in your hand then add a cube of mozzarella and shape the meat around it to create a meatball. Repeat with the rest of the mixture.

A pile of mozzarella stuffed meatballs in a blue bowl

Serving Suggestions and Using Leftovers

You’re going to love these meatballs served over pasta or zucchini noodles, or stuffed inside a hoagie roll. My family devoured them when I first served the meal, and we’ve enjoyed the leftovers again from the freezer. That’s right — I got TWO dinners from one effort (eat half now, freeze the other half for later), which is the true definition of efficiency! Thanks to Julie for this wonderful idea!

More Meatball Recipes You Might Like:

Slow Cooker Mozzarella-Stuffed Meatballs

5 from 1 vote
Prep: 30 minutes
Cook: 5 hours
Total: 5 hours 30 minutes
Servings 8 (24 total meatballs)
Calories 253 kcal
These mozzarella stuffed meatballs are easy, comforting and healthy. Packed with delicious veggies and all made in the slow cooker, it couldn't be easier!


For the Meatballs:

  • 1.5 lb. ground beef I used 93% lean
  • 1 large egg beaten
  • 2 tablespoons milk
  • 2 tablespoons grated Parmesan cheese
  • ¾ teaspoon salt
  • ¼ teaspoon garlic powder
  • ¼ teaspoon pepper
  • 2 teaspoons Italian seasoning
  • 1 log 8 ounces fresh mozzarella cheese, or if you can find them I like to use the fresh mozzarella snacking cheese balls because they’re already shaped in exactly the right size – it’s an easy shortcut!

For the Sauce:


  • Place vegetables (carrots, onion, bell pepper, and mushrooms) in bottom of slow cooker.
  • In a large bowl, use hands to gently combine first 8 meatball ingredients (beef through Italian seasoning). Cut mozzarella into small cubes (about ½-inch diameter). Mold meat mixture around each piece of cheese to form round balls.
  • Place raw meatballs on top of vegetables in the slow cooker.
  • In a separate bowl, combine tomato paste, broth, marinara, salt, oregano, and basil. Pour over meatballs.
  • Cover and cook on low for 4-6 hours. Give everything a good stir and serve over pasta, zucchini noodles, or in hoagie rolls!


Calories: 253kcalCarbohydrates: 11gProtein: 27gFat: 11gSaturated Fat: 4gCholesterol: 84mgSodium: 1066mgPotassium: 837mgFiber: 2gSugar: 6gVitamin A: 3525IUVitamin C: 28.3mgCalcium: 162mgIron: 3.6mg
Keyword: Cheese Stuffed Meatballs, Mozzarella Stuffed Meatballs, slow cooker meatballs
Course: Main Course
Cuisine: American
Author: The Seasoned Mom




Hey, I’m Blair!

Welcome to my farmhouse kitchen in the foothills of Virginia’s Blue Ridge Mountains. Inspired by local traditions and seasonal fare, you’ll find plenty of easy, comforting recipes that bring your family together around the table. It’s down-home, country-style cooking!

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  1. Kimber says:

    These look sooooo good! I love it when feeding your family can still be healthy and delicious!! That shot where the cheese is stretching… oh my!!

    1. Blair says:

      That’s the key, Kimber! Healthy, delicious, family-friendly! Thanks so much, friend!

  2. Jen | Baked by an Introvert says:

    Whoa! That melty cheese in the center of the meatballs has my mouth watering. Love this so much, Blair. Isn’t the slow cooker great? I want to make these for hubster!!

    1. Blair says:

      You’ll score big brownie points with the man of the house if you make these for him…TRUST ME. 🙂

      Thanks, Jen!

  3. Robyn @ Simply Fresh Dinners says:

    5 stars
    Genius recipe, Blair! Kudos to you and Julie for teaming up to create something healthy, delicious and easy! Love it when readers contribute to the blog. Meatballs are the best and I can’t wait to try this!
    Enjoy your weekend 🙂

    1. Blair says:

      Thanks so much, Robyn! You are SO kind! I hope that you enjoy the weekend as well!

  4. Kristy from Southern In Law says:

    Ooooooh, that gooey cheese looks so so good! I NEED to try this! What a delicious recipe Julie shared!

    1. Blair says:

      Hi, Kristy! Thanks so much! It’s a keeper!