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A plate of spaghetti topped with meatballs, tomato sauce, grated cheese, and fresh basil. A fork is cutting into a meatball.

Slow Cooker Italian Meatballs (in Marinara)

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Slow cooker Italian meatballs in marinara made with ground beef, parmesan, and breadcrumbs. A dump-and-go weeknight dinner with no pre-browning!
Course dinner, Main Course
Cuisine American, Italian
Keyword comfort food, crock pot, Crockpot, dump-and-go, easy, ground beef, meatballs, one pot, Slow Cooker, weeknight dinner
Prep Time 10 minutes
3 hours
Total Time 3 hours 10 minutes
Servings 6
Calories 424

Equipment

Ingredients

  • 1 small yellow onion, ends removed and peeled
  • 1 large egg
  • 2 cloves garlic, minced
  • cup Italian breadcrumbs
  • 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

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.

Nutrition

Serving: 1 (of 6, about 4 meatballs with sauce) | Calories: 424kcal | Carbohydrates: 19g | Protein: 41g | Fat: 20g | Saturated Fat: 8g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 8g | Cholesterol: 116mg | Sodium: 633mg | Potassium: 1156mg | Fiber: 4g | Sugar: 8g | Vitamin A: 882IU | Vitamin C: 15mg | Calcium: 171mg | Iron: 6mg
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