Easy Slow Cooker Meatball Sub Sliders
These easy slow cooker meatball sub sliders are a crowd-pleasing hit with tender meatballs soaked in marinara sauce, melted mozzarella, and toasted slider buns. Perfect for gatherings, game days, or casual dinners with minimal fuss and maximum flavor.
- Prep Time: 10 minutes
- Cook Time: 4 to 5 hours (low) or 2 to 3 hours (high)
- Total Time: 4 hours 10 minutes to 5 hours 10 minutes (low) or 2 hours 10 minutes to 3 hours 10 minutes (high)
- Yield: 12 sliders 1x
- Category: Main Course
- Cuisine: American
Ingredients
Scale
- 24 medium-sized frozen or fresh pre-cooked meatballs
- 3 cups marinara sauce
- 12 soft slider buns (potato or brioche-style recommended)
- 2 cups shredded mozzarella cheese
- ½ cup grated Parmesan cheese (optional)
- 3 tablespoons melted butter
- 1 teaspoon garlic powder
- 1 teaspoon dried Italian herbs (oregano, basil, thyme blend)
- Fresh basil or parsley for garnish (optional)
Instructions
- Spray the inside of a 6-quart slow cooker lightly with non-stick spray or line with a slow cooker liner.
- In a bowl, mix the marinara sauce with garlic powder and dried Italian herbs.
- Place the frozen or thawed meatballs in the slow cooker and pour the seasoned marinara sauce over them. Stir gently to coat evenly.
- Cover and cook on low for 4 to 5 hours or on high for 2 to 3 hours until meatballs are tender and heated through. Avoid lifting the lid during cooking.
- About 15 minutes before serving, preheat oven to 350°F (175°C). Slice slider buns in half horizontally.
- Mix melted butter with a pinch of garlic powder and brush onto the cut sides of the buns.
- Arrange buns cut-side up on a baking sheet and toast in the oven for 5 to 7 minutes until lightly golden and crispy.
- Spoon 2 meatballs with sauce onto each bottom bun half. Sprinkle shredded mozzarella and grated Parmesan over the meatballs. Place top bun halves on sliders.
- Optional: Place assembled sliders under the broiler for 2 to 3 minutes until cheese melts and bubbles. Watch carefully to prevent burning.
- Garnish with chopped fresh basil or parsley and serve warm.
Notes
Use pre-cooked meatballs to ensure tenderness and prevent falling apart. Avoid opening the slow cooker lid during cooking to maintain temperature. Toast buns just before serving to prevent sogginess. Optional broiler step melts cheese nicely but can be skipped. For variations, try spicy sausage meatballs, plant-based meatballs, different cheeses, or gluten-free buns.
Nutrition
- Serving Size: 1 slider
- Calories: 0.28
- Sugar: 5
- Sodium: 600
- Fat: 14
- Saturated Fat: 7
- Carbohydrates: 22
- Fiber: 1.5
- Protein: 15
Keywords: slow cooker, meatball sliders, easy recipe, crowd-pleaser, party food, comfort food, marinara, mozzarella, slider buns