On nights when you’re craving something warm, filling, and unapologetically comforting, this loaded mashed potato and meatball casserole is exactly what hits the spot.
There’s something deeply satisfying about layering familiar ingredients—tender meatballs, creamy mashed potatoes, rich marinara, and melted cheese—into one bubbling dish and letting the oven do the rest.
As it bakes, the kitchen fills with the savory aroma of garlic, herbs, and turkey bacon, and by the time it comes out of the oven, you’re rewarded with a cozy, hearty meal that feels both nostalgic and indulgent.
This is the kind of dinner that’s perfect for slow evenings, family gatherings, or anytime you want food that’s comforting, generous, and meant to be shared.
For the Meatballs
- Ground Beef – Adds rich, savory flavor and structure to the meatballs. Using lean beef keeps them hearty without being greasy.
- Ground Turkey – Brings extra moisture and tenderness, helping the meatballs stay juicy as they bake.
- Bread Crumbs – Act as a binder to hold the meatballs together while keeping the texture soft.
- Onion – Adds moisture and subtle sweetness that balances the meat and cheese.
- Eggs – Help bind all the ingredients together so the meatballs keep their shape.
- Salt and Pepper – Essential for seasoning the meat mixture evenly throughout.
- Garlic – Provides bold, aromatic flavor that complements the beef and turkey.
- Fresh Parsley – Brightens up the meatballs and adds a touch of freshness.
- Parmesan Cheese – Adds salty, nutty depth and boosts overall flavor.
For the Loaded Mashed Potatoes
- Mashed Potatoes – The creamy base of the casserole that holds everything together.
- Fresh Parsley – Adds color and a light, fresh note to balance the richness.
- Turkey Bacon – Brings smoky, salty crunch that makes the potatoes “loaded.”
- Garlic – Enhances the savory flavor of the potatoes without overpowering them.
- Eggs – Help the mashed potatoes firm up slightly as they bake so they hold their shape.
- Cheddar Cheese – Adds sharp, cheesy richness throughout the potato mixture.
- Salt and Pepper – Season the potatoes so every bite is flavorful.
For the Marinara Sauce
- Olive Oil – Used to sauté the onions and garlic, creating a flavorful base.
- Onion – Adds sweetness and depth to the sauce as it cooks down.
- Garlic – Infuses the sauce with classic Italian-style flavor.
- Tomato Sauce – Forms the body of the marinara and ties everything together.
- Basil – Adds freshness and a traditional herb note.
- Salt and Sugar – Balance the acidity of the tomatoes for a smoother sauce.
- Pepper, Thyme, and Oregano – Add warmth and complexity to the marinara.
For the Topping
- Mozzarella Cheese – Melts beautifully over the meatballs, creating that irresistible cheesy finish.
The Perfect Loaded Mashed Potato and Meatball Casserole Recipe
Ingredients
For the Meatballs- 1 pound lean ground beef
- 1 pound ground turkey
- ½ cup bread crumbs
- ½ cup diced onion
- 2 large eggs
- 1 teaspoon salt
- 1 teaspoon pepper
- 3 cloves fresh garlic, minced
- ¼ cup fresh parsley, minced
- ⅓ cup grated parmesan cheese
- 3 cups mashed potatoes, about 5 potatoes, if using homemade
- 1 tablespoon fresh parsley, minced
- 6 slices turkey bacon, cooked and chopped
- 1 teaspoon garlic, minced
- 2 large eggs
- ½ cup shredded cheddar cheese
- 1 teaspoon salt
- ½ teaspoon pepper
- 2 teaspoons olive oil
- ¼ cup onion, diced
- 2 cloves garlic, minced
- 2 cups tomato sauce
- 4 large basil leaves, minced (or 1 tablespoon dried basil)
- ½ teaspoon salt
- ¼ teaspoon sugar
- ¼ teaspoon pepper
- ¼ teaspoon thyme
- ¼ teaspoon oregano
- 2 slices mozzarella cheese
Instructions
Make the Meatballs- Heat the oven to 350°F. Prepare a cookie sheet or cake pan with nonstick cooking spray or parchment paper.
- Add all meatball ingredients to a large bowl and mix until evenly combined.
- Use a large ice cream scoop to portion the mixture into 12 equal amounts, rolling each into a ball.
- Arrange the meatballs on the prepared pan and bake for 28–30 minutes, until fully cooked.
- Remove from the oven and set aside.
- Coat a 9×13 baking dish with nonstick spray and set it aside.
- In a large bowl, stir together all of the mashed potato ingredients until well mixed.
- With a large ice cream scoop, portion the mixture into 12 large scoops and arrange them in the baking dish in rows of three.
- Using a spoon or small scoop, press a shallow well into the center of each potato mound.
- Place one cooked meatball into each indentation on top of the potatoes.
- Warm the olive oil in a large saucepan over medium heat. Add the diced onion and cook for about 5 minutes, until softened.
- Stir in the garlic and cook for another 60 seconds.
- Pour in the tomato sauce and mix well. Add the basil and let the sauce simmer for 10 minutes.
- Season with salt, sugar, pepper, thyme, and oregano, then continue cooking for 5 more minutes.
- Spoon marinara sauce over each meatball and top each one with a slice of mozzarella cheese.
- Place the dish in the oven and bake for 10 minutes.
- Switch the oven to broil at 500°F and move the pan to the top rack. Broil for 3–5 minutes, until the cheese is lightly browned. Note: Broiling is safest in metal baking pans. Glass and ceramic pans may crack under high heat.
- Remove from the oven and serve with bread or your favorite side dish.
- Storage: Transfer leftovers to an airtight container and refrigerate for up to 5 days.
Calories: 766 | Carbohydrates: 36g | Protein: 49g | Fat: 47g | Saturated Fat: 20g | Polyunsaturated Fat: 23g | Trans Fat: 1g | Cholesterol: 266mg | Sodium: 2502mg | Fiber: 4g | Sugar: 7g
1. Can I get a head start and make parts of this ahead?
Absolutely. The meatballs can be baked a day ahead and kept in the fridge once cooled. When it’s time to assemble, just let them lose the fridge chill before nesting them into the potatoes. Dinner feels much easier when future-you has already done some of the work.
2. Do I need homemade mashed potatoes?
Nope! Homemade is lovely, but store-bought mashed potatoes work just fine here. The key is that the potatoes are already cooked and seasoned, because this recipe is about assembling and baking, not cooking potatoes from scratch.
3. Is the homemade marinara really necessary?
Only if you want it to be. A good-quality jarred marinara is a perfectly acceptable shortcut. Warm it up and taste it — a pinch of extra herbs or seasoning is all it needs to shine in this dish.
4. Can I assemble the whole thing earlier in the day?
Yes, and it’s a great idea for busy nights. Assemble the casserole, cover it well, and refrigerate for up to 8 hours. Just expect to add a few extra minutes in the oven since it’s going in cold.
5. What should I serve with something this hearty?
This casserole is rich and filling, so keep the sides simple. Think garlic bread, a crisp green salad, or some steamed vegetables. You want something fresh to balance out all that creamy, cheesy goodness.
