Slow Cooker Meatball Subs Recipe

 Posted by on October 29, 2014  Add comments  Tagged with:
Oct 292014

These Slow Cooker Meatball Subs are so delicious! Your family will love them!

My parents watched Kayleigh for us overnight last weekend, so John and I actually had some time to relax for a while.  We’ve both been super busy and feeling under the weather for a while now, so it was a much needed break. This post contains affiliate links. I may earn a commission if you make a purchase after clicking a link in this post.

Instead of spending lots of time and energy cooking a big meal, I decided to make some meatball subs using my slow cooker.  My slow cooker has seriously been getting a workout this fall.  I’ve had it for years now, but never really put it to much use until lately.  What was I thinking??  It’s so easy to have a warm and delicious meal ready for dinner time without putting a lot of time and energy into it, and without a lot of clean up. I can’t believe I waited so long to try making these slow cooker meatball subs!
I loved how these meatballs came out, and they were so tasty sandwiched in a toasted roll with some melted mozzarella cheese on the top.  We had some leftover sauce and meatballs, and I used them to make a yummy meatball pizza the next day too!

These slow cooker meatball subs are a perfect dinner option for a cool fall day. This recipe can easily be doubled or tripled if you’re hosting a party, too. 

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Slow Cooker Meatball Subs


  • 1 pound 90% lean ground hamburg
  • 4 cloves of garlic (minced)
  • 1/2 cup Italian style breadcrumbs
  • 1 egg (slightly beaten)
  • 1/2 cup grated Parmesan cheese
  • 1 cup shredded Mozzarella cheese (separated) plus extra for topping if desired
  • 1 tsp. oregano
  • 1 tsp. basil
  • 1/4 tsp. salt
  • 1/4 tsp. pepper
  • 1/4 tsp. onion powder
  • 1 24 oz. jar of Tomato Basil Marinara Sauce
  • 1 14.5 oz can of Basil, Oregano & Garlic Diced Tomatoes

Prevent a Mess in Your Slow Cooker

Heads up – this recipe will make a real mess in your slow cooker! Make clean-up a breeze with these Reynolds Kitchens Slow Cooker Liners.

These liners will hold in the heartiest ingredients without breaking or puncturing in the slow cooker. Forget soaking and scrubbing! Just throw away the liner once the meal is served, and your slow cooker will still be clean! These BPA Free liners are made of high temperature safe materials for cooking in slow cookers.


In a large bowl, mix all ingredients together, except for the marinara sauce, diced tomatoes and 1/2 cup of the Mozzarella cheese, until well combined.  Roll mixture into 1.5 inch meatballs.

Pour 1/2 jar of marinara sauce and 1/2 can of diced tomatoes into bottom of slow cooker and mix together.  Place meatballs in an even layer on top of sauce.  Cover meatballs with remaining marinara sauce and diced tomatoes.  Cover and cook on low for 6 hours.

After 6 hours have passed, remove meatballs from slow cooker with a slotted spoon and set aside.  Stir 1/2 cup of Mozzarella cheese into remaining sauce in slow cooker.  Stir until cheese has melted and sauce has thickened.

Toast sandwich buns if desired.  Fill with meatballs.  Top your slow cooker meatball subs with additional sauce and Mozzarella cheese, and enjoy!

Note:  This slow cooker meatball subs recipe makes about 10-12 large meatballs.

  8 Responses to “Slow Cooker Meatball Subs Recipe”

  1. I haven’t had a meatball sub in a while…Your pic put me in the mood!

  2. Yum, I’m a big lover of meatball subs. I’ve never made mine in the crockpot before so I’m excited to try your recipe! I’d love for you to come link up with us tonight at our Throwback Thursday link party!

  3. I haven’t brought out the slow cooker yet, but I’m thinking about it. I don’t mix cheese and meat, but this might be good for the meatballs.

    Thanks for sharing.

  4. What a great recipe for the upcoming football season, this is great. Thanks so much for sharing with us at Full Plate Thursday and have a great week!
    Come Back Soon!
    Miz Helen

  5. Hello Pretty Lady, you are so creative! Thank you for sharing at the Friday Favorites Link Party! Please join us again to share what you have been working on this week. Christine @ Must Love Home

  6. […] Slow Cooker Meatball Subs – Sincerely Mindy […]

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