If you need a quick, crowd-pleasing meal that practically makes itself, this 2-Ingredient Crockpot Meatball Subs Filling is about to become a regular in your dinner rotation. It’s the ultimate dump-and-go slow cooker recipe—perfect for busy weeknights, game days, potlucks, or anytime you want something hearty without a lot of effort.
With just two simple ingredients, your crockpot transforms frozen meatballs into a rich, saucy filling that’s perfect for stuffing into hoagie rolls, piling onto sub buns, or even serving over pasta.
Why You’ll Love This Recipe
- Only 2 ingredients
- Minimal prep — just dump and cook
- Slow cooker does all the work
- Perfect for feeding a crowd
- Family-friendly and budget-friendly
- Great for meal prep and leftovers
This is one of those recipes that disappears fast—and everyone asks how you made it.
Ingredients
You only need two ingredients to make this easy meatball sub filling:
- 1 (32-oz) bag frozen fully cooked meatballs
- 3 cups marinara sauce (store-bought or homemade)
That’s it. No extra seasoning needed.
How to Make 2-Ingredient Crockpot Meatball Subs Filling
Step 1: Add the Meatballs
Place the frozen meatballs directly into the crockpot. No need to thaw them first.
Step 2: Add the Sauce
Pour 3 cups of marinara sauce over the meatballs. Stir gently so all the meatballs are evenly coated.
Step 3: Slow Cook
Cover and cook:
- On LOW for 4–5 hours, or
- On HIGH for 2–3 hours
Stir once halfway through if possible to ensure even heating.
Step 4: Serve
Once heated through and bubbling, the meatball filling is ready to serve.
How to Make Meatball Subs
To turn this filling into classic meatball subs:
- Slice hoagie rolls or sub buns lengthwise.
- Spoon meatballs and sauce generously into each roll.
- Top with shredded mozzarella or provolone cheese (optional).
- Broil for 2–3 minutes until the cheese is melted and bubbly.
Helpful Tips for Best Results
- Use Italian-style meatballs for extra flavor.
- If your sauce is very thick, add ¼ cup water to prevent sticking.
- For smaller meatballs, reduce cooking time slightly.
- Keep the crockpot on WARM for serving at parties.
Serving Ideas
This crockpot meatball filling is incredibly versatile:
- Meatball subs or sliders
- Over spaghetti or penne
- As an appetizer with toothpicks
- Stuffed into baked potatoes
- Served over rice or polenta
Storing & Reheating Leftovers
- Refrigerator: Store leftovers in an airtight container for up to 4 days.
- Freezer: Freeze meatballs with sauce for up to 2 months.
- Reheat: Warm in the microwave or slow cooker with extra sauce if needed.
Why This Recipe Works
Using frozen fully cooked meatballs saves time and guarantees consistent results. The slow cooker gently heats them while allowing the meatballs to soak up the marinara sauce, creating rich flavor without any extra ingredients.
It’s comfort food made simple.
Final Thoughts
This 2-Ingredient Crockpot Meatball Subs Filling proves that easy recipes can still deliver big flavor. Whether you’re feeding your family or a crowd, this slow cooker classic is always a hit.