Name: Spaghetti Alfredo Casserole Recipe
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: Italian-American
Ingredients: 1 lb Spaghetti; 1 lb Ground beef; 1 cup Chopped yellow onion; 2 cloves Garlic, minced; Kosher salt and pepper, to taste; 1 (24 oz) jar Favorite pasta sauce; 1 stick Unsalted butter (8 tablespoons); 2 cups Heavy whipping cream; 1 tsp Onion powder; 1 tsp Garlic powder; Kosher salt and pepper, to taste; 2 cups Finely grated Parmesan cheese; 2 cups Shredded mozzarella cheese; Fresh parsley, for garnish

Jump to Recipe·4 from 15 reviews

If you’re craving a hearty, comforting meal that combines the creamy richness of Alfredo sauce with the beloved familiarity of spaghetti, the Spaghetti Alfredo Casserole Recipe is your new go-to dish. This casserole is a delightful fusion of tender spaghetti noodles, savory ground beef, and a luscious Alfredo sauce baked to golden, bubbly perfection. It’s the kind of dish that feels like a warm hug on a plate and is perfect for weeknight dinners or special family gatherings. Plus, it’s surprisingly simple to make, proving that delicious comfort food doesn’t have to be complicated.

Ingredients You’ll Need

A white rectangular baking dish filled with one layer of creamy spaghetti noodles, the noodles are pale yellow and coated evenly with a smooth, light cream sauce, creating a glossy look. The dish sits on a white marbled textured surface. photo taken with an iphone --ar 4:5 --v 7

These ingredients are straightforward but work together beautifully to create layers of flavor and texture in your casserole. Each item plays a vital role, from the creamy sauce to the savory meat and melted cheese topping.

1 lb Spaghetti: The base of our casserole, cooked al dente to hold its shape through baking.
1 lb Ground beef: Adds a hearty, savory depth to balance the creamy Alfredo.
1 cup Chopped yellow onion: Provides sweetness and aromatic flavor when sautéed.
2 cloves Garlic, minced: Offers a punch of savory warmth essential to the sauce.
Kosher salt and pepper: To season every layer perfectly.
1 24oz jar Favorite pasta sauce: Brings a rich tomato base that complements the creamy elements.
1 stick Unsalted butter: The foundation for the Alfredo sauce’s silky texture.
2 cups Heavy whipping cream: Creates the luscious, velvety consistency that makes Alfredo unforgettable.
1 tsp Onion powder: Enhances the depth of flavor in the cream sauce.
1 tsp Garlic powder: Adds extra garlicky goodness to the sauce.
2 cups Finely grated Parmesan cheese: Essential for that sharp, nutty kick in the Alfredo sauce.
2 cups Shredded mozzarella: Melts beautifully on top to form a golden, bubbly crust.
Fresh parsley, for garnish: Adds a fresh, vibrant note and a pop of color when serving.

How to Make Spaghetti Alfredo Casserole Recipe

Step 1: Cook the Spaghetti

Start by bringing a large pot of salted water to a boil, then add your spaghetti noodles. Cook them just until al dente according to the package directions so they have a little bite and won’t turn mushy during baking. Drain the noodles and transfer them into a large bowl to be combined with the rich Alfredo sauce later.

Step 2: Prepare the Meat Sauce

While the pasta cooks, heat a medium skillet over medium-high heat and add the ground beef. Break it apart with a wooden spoon and cook until no longer pink, about five minutes. Season with salt and pepper for seasoning balance. Toss in the chopped onion and minced garlic next, cooking until the onion softens and everything smells irresistible. Pour in your favorite pasta sauce, stir everything together, and let it simmer gently over low heat to meld the flavors.

Step 3: Make the Alfredo Sauce

In a small saucepan over low heat, melt the butter. Then slowly add the heavy whipping cream, giving it a good stir so everything blends smoothly. Season with garlic powder, onion powder, salt, and pepper to deepen the flavor. Gradually stir in the grated Parmesan cheese, continuing to whisk until the sauce thickens slightly and turns creamy perfection. This velvety Alfredo sauce is what makes this casserole stand out from the crowd.

Step 4: Combine and Assemble

Pour the creamy Alfredo sauce over your cooked spaghetti noodles and toss gently to coat every strand evenly. Spray a 9×13 baking dish with cooking spray to prevent sticking, then spread the coated noodles in an even layer. Spoon the savory meat sauce on top of the noodles, followed by a generous sprinkle of shredded mozzarella cheese to create that irresistible, golden crust.

Step 5: Bake to Perfection

Place your prepared casserole in the preheated 350-degree oven and bake uncovered for about 20 minutes. Keep an eye out for that gorgeous golden-brown topping bubbling around the edges. Once done, your Spaghetti Alfredo Casserole Recipe will be ready to serve hot and ooey-gooey.

How to Serve Spaghetti Alfredo Casserole Recipe

The image shows a baked dish in a white rectangular ceramic baking dish with handles on each side. The dish has a golden brown melted cheese top layer with spots of light browning and resting on a lightly textured creamy sauce beneath. Green chopped herbs are sprinkled evenly across the cheesy surface, adding fresh color contrast. The edges reveal a rich filling with hints of browned bits indicating a savory mixture. A silver spoon rests inside the dish on one side, partially under the cheese layer. The baking dish sits on a white marbled surface, with two clear glasses of water nearby and some scattered herbs decorating the area. Photo taken with an iphone --ar 4:5 --v 7

Garnishes

Fresh parsley sprinkled on top adds a lovely burst of color and a mild herbal brightness that cuts through the rich, cheesy sauce. A light dusting of extra Parmesan cheese right before serving is a wonderful touch too, enhancing the cheesy experience.

Side Dishes

Since the casserole is rich and filling, pairing it with fresh, crisp side salads or steamed vegetables works perfectly to balance the meal. Consider a simple Caesar salad or garlic-roasted broccoli to complement the creamy textures and savory flavors of the casserole.

Creative Ways to Present

Serve this casserole in individual ramekins for personalized portions, especially fun for family-style dinners. You can also add a sprinkle of crushed red pepper flakes on top for a subtle kick or drizzle a bit of truffle oil to elevate the aroma and indulgence.

Make Ahead and Storage

Storing Leftovers

Any leftovers from your Spaghetti Alfredo Casserole Recipe can be stored in an airtight container in the fridge for up to four days. Let it cool completely before refrigerating to maintain freshness and prevent sogginess.

Freezing

This casserole freezes beautifully! Simply assemble in a freezer-safe dish, cover tightly with foil or plastic wrap, and freeze for up to two months. Thaw it overnight in the fridge before reheating for best results.

Reheating

To reheat, place a portion in the microwave on medium power, stirring halfway through to ensure even warming. Alternatively, reheat in a 350-degree oven covered with foil to prevent drying, removing the foil during the last few minutes for a crispy top.

FAQs

Can I use a different type of pasta for this casserole?

Absolutely! While spaghetti works beautifully, you can substitute with penne, rigatoni, or even bowtie pasta. Just keep the cooking times similar to ensure the pasta holds up well in the sauce and baking.

Is it possible to make this dish vegetarian?

Yes, you can omit the ground beef and swap in sautéed mushrooms or your favorite vegetables like spinach or zucchini for a delicious vegetarian version without sacrificing flavor.

What can I use instead of heavy whipping cream in the Alfredo sauce?

If you want a lighter version, half-and-half or whole milk with a bit of flour to thicken can work, but the sauce won’t be as rich and creamy as with heavy cream. Another option is using a plant-based cream alternative.

Can I prepare the casserole entirely ahead of time and bake later?

Definitely! You can assemble the entire casserole, cover it tightly, and refrigerate for up to 24 hours before baking. It’s perfect for meal prep or prepping for guests.

How do I get a crispy top layer on the casserole?

Using shredded mozzarella cheese ensures a nicely melted, golden top. For even crispier results, you can broil the casserole for the last 2-3 minutes, watching carefully to avoid burning.

Final Thoughts

This Spaghetti Alfredo Casserole Recipe is truly a showstopper that brings comfort, indulgence, and simplicity all into one incredible dish. Whether you’re feeding family or impressing friends, its creamy layers and cheesy topping always satisfy. I encourage you to give it a try soon—you might just find your new favorite way to enjoy classic spaghetti and Alfredo with a cozy twist.