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Slow Cooker Turkey Meatballs in Marinara

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Tender, herb-packed turkey meatballs made with ricotta and Parmesan, simmered from scratch in a rich San Marzano marinara that deepens and intensifies over hours in the slow cooker. Lighter than traditional beef meatballs but every bit as satisfying — the turkey’s clean flavor lets the herbs, garlic, and tomato sauce shine through in every bite. Serve over pasta, in a hoagie, over zucchini noodles, or straight from the pot with good bread to catch the sauce.

  • Total Time: 5 hours 45 minutes
  • Yield: 6 servings (approximately 24–28 meatballs) 1x

Ingredients

Scale

The Turkey Meatballs

  • 2 lbs (900g) ground turkey, 93% lean
  • ½ cup (55g) plain or panko breadcrumbs
  • ¼ cup (60g) whole milk ricotta cheese
  • ½ cup (50g) freshly grated Parmesan cheese
  • 1 large egg
  • 2 cloves garlic, minced
  • 2 tbsp fresh parsley, finely chopped
  • 2 tbsp fresh basil, finely chopped
  • 1 tsp dried Italian seasoning
  • 1 tsp garlic powder
  • 1 tsp onion powder
  • ½ tsp dried oregano
  • ½ tsp fennel seeds, lightly crushed (optional)
  • 1½ tsp salt
  • ½ tsp black pepper
  • 1 tbsp olive oil (if browning)

The Marinara Sauce

  • 1 can (28 oz) whole peeled San Marzano tomatoes, crushed by hand
  • 1 can (14.5 oz) fire-roasted diced tomatoes (optional)
  • 2 tbsp tomato paste
  • 1 small onion, finely diced
  • 4 cloves garlic, minced
  • 2 tbsp olive oil
  • 1 tsp dried Italian seasoning
  • 1 tsp dried oregano
  • ½ tsp salt
  • ¼ tsp black pepper
  • ¼ tsp red pepper flakes (optional)
  • 45 fresh basil leaves, torn (during cooking)

To Finish

 

  • Large handful of fresh basil, torn
  • Generous drizzle of extra-virgin olive oil
  • Extra grated Parmesan, for serving
  • Salt to taste

Instructions

  • Make the meatball mixture. In a large bowl, combine the ground turkey, breadcrumbs, ricotta, Parmesan, egg, minced garlic, parsley, basil, Italian seasoning, garlic powder, onion powder, oregano, fennel seeds (if using), salt, and pepper. Mix gently with your hands or a fork until just combined — do not overmix. Refrigerate the mixture for 20–30 minutes if time allows.
  • Shape the meatballs. With damp hands, roll the mixture into balls approximately 1.5 inches in diameter (golf ball-sized). Place on a plate or lined tray. You should get approximately 24–28 meatballs.
  • Brown the meatballs (optional but recommended). Heat olive oil in a large skillet over medium-high heat. Working in batches, sear the meatballs for 2 minutes per side until golden on the outside but not cooked through. Transfer to a plate.
  • Build the marinara. In the slow cooker, combine the hand-crushed San Marzano tomatoes (with their juice), fire-roasted diced tomatoes (if using), tomato paste, diced onion, minced garlic, olive oil, Italian seasoning, oregano, salt, pepper, red pepper flakes (if using), and torn fresh basil leaves. Stir well to combine.
  • Add the meatballs. Spoon a thin layer of sauce across the bottom of the slow cooker. Nestle the meatballs in a single layer (or carefully staggered layers) into the sauce. Spoon the remaining sauce over and around the meatballs so each is partially submerged.
  • Cook. Set the slow cooker to LOW and cook for 4–6 hours, or HIGH for 2–3 hours. Do not stir during cooking — leave the meatballs completely undisturbed until the final 30 minutes.
  • Check for doneness. The meatballs are done when they register 165°F (74°C) internally and are firm and cooked through with no pink remaining. The sauce should be thickened and deeply colored.
  • Finish the sauce. Taste the sauce and adjust seasoning — more salt, a pinch of sugar if the tomatoes are acidic, or extra red pepper flakes for heat. Stir in a generous drizzle of good extra-virgin olive oil.

 

  • Garnish and serve. Scatter torn fresh basil generously over the top. Serve over pasta, zucchini noodles, polenta, or cauliflower mash. Finish each serving with extra grated Parmesan and another drizzle of olive oil.

Notes

  • Ricotta is the secret ingredient. A few tablespoons of whole milk ricotta in the meatball mixture adds moisture, creaminess, and tenderness that breadcrumbs alone cannot achieve. If you have it, use it. If not, add an extra tablespoon of olive oil to the mixture to compensate.
  • Do not overmix the turkey. This is the single most important technique rule. Mix just until combined — gently, briefly, and no more. Overworking activates the gluten in the breadcrumbs and compresses the proteins, producing dense, tough meatballs.
  • Chill before rolling. Even 15 minutes in the fridge makes the mixture significantly easier to handle and produces rounder, more uniform meatballs. If you have time, do it.
  • San Marzano tomatoes make the sauce. Their sweetness and low acidity produce a noticeably better marinara than standard canned tomatoes. Look for the DOP certification on the can. Crush them by hand directly into the slow cooker for the best texture.
  • Do not stir during the first half of cooking. Turkey meatballs are tender and can break apart before they have fully set. Leave them undisturbed for at least the first 2–3 hours of cooking on LOW.
  • Finish with fresh basil and good olive oil. These two finishing touches transform the sauce from slow-cooked to something that tastes bright, fresh, and alive. Use real fresh basil — dried basil stirred in at the end adds nothing.

 

  • Day two tastes better. The meatballs continue to absorb the sauce overnight, and the sauce deepens in flavor. Leftover turkey meatball marinara is one of the great weeknight rewards.
  • Author: Elle
  • Prep Time: 20 minutes
  • Cook Time: 5 hours (on LOW)
  • Category: Dinner, Main Dish
  • Method: Slow Cooking
  • Cuisine: American, Italian