Beef Tetrazzini Casserole

Beef Tetrazzini Casserole is a delicious and creamy pasta dish loaded with tender beef sirloin, mushrooms, and a rich, cheesy sauce. This casserole is perfect for family dinners or gatherings, providing a hearty and comforting meal everyone will enjoy.

Ingredients for Beef Tetrazzini Casserole

1 pound beef sirloin, thinly sliced
12 ounces egg noodles
2 tablespoons olive oil
1 onion, finely chopped
3 cloves garlic, minced
8 ounces mushrooms, sliced
1 cup beef broth
1 cup heavy cream
½ cup sour cream
1 cup grated Parmesan cheese
½ cup grated mozzarella cheese
¼ cup all-purpose flour
2 tablespoons butter
Salt and pepper, to taste
2 tablespoons fresh parsley, chopped (for garnish)

Instructions for Beef Tetrazzini Casserole

1. Cook the Egg Noodles

Bring a large pot of salted water to a boil. Add the 12 ounces of egg noodles and cook according to the package directions until al dente. Drain and set aside.

2. Cook the Beef

In a large skillet, heat 2 tablespoons of olive oil over medium-high heat. Add the thinly sliced beef sirloin and cook for 4-5 minutes, until browned. Season with salt and pepper to taste. Remove the beef from the skillet and set aside.

3. Sauté the Vegetables

In the same skillet, add the 2 tablespoons of butter. Once melted, add the chopped onion, minced garlic, and sliced mushrooms. Cook for about 5-6 minutes, until the onions are soft and the mushrooms are tender.

4. Make the Sauce

Sprinkle the ¼ cup all-purpose flour over the sautéed vegetables and stir to combine, cooking for about 1-2 minutes to remove the raw flour taste.
Gradually add the 1 cup beef broth and 1 cup heavy cream, stirring constantly to create a smooth sauce. Bring the mixture to a simmer and cook for 3-4 minutes, until it thickens slightly.
Stir in the ½ cup sour cream, 1 cup grated Parmesan cheese, and ½ cup grated mozzarella cheese, stirring until the cheese is fully melted and the sauce is creamy. Season with salt and pepper to taste.

5. Combine and Assemble

Preheat your oven to 350°F (175°C).
In a large bowl, combine the cooked egg noodles, beef, and creamy mushroom sauce. Toss everything together until evenly coated.
Transfer the mixture into a greased 9×13-inch baking dish.

6. Bake the Casserole

Bake the casserole in the preheated oven for 20-25 minutes, or until bubbly and golden on top.

7. Garnish and Serve

Once the casserole is baked, remove it from the oven and sprinkle with freshly chopped parsley for garnish.
Serve hot and enjoy!

Cook’s Notes and Tips

Beef Option: You can substitute the sirloin with ground beef, ribeye, or leftover roast beef.
Cheese: For a richer flavor, you can add extra mozzarella or even cheddar to the top of the casserole before baking.
Make it Ahead: This casserole can be assembled ahead of time and stored in the refrigerator for up to 24 hoursbefore baking.

Variations for Beef Tetrazzini Casserole

1. Spicy Beef Tetrazzini

Add a pinch of red pepper flakes or cayenne pepper to the sauce for a bit of heat.

2. Chicken Tetrazzini

Replace the beef with cooked and shredded chicken breast for a classic chicken tetrazzini version.

3. Vegetarian Tetrazzini

Omit the beef and add extra vegetables like spinach, zucchini, or bell peppers for a hearty vegetarian dish.

Frequently Asked Questions (FAQs)

1. Can I freeze this casserole?

Yes! You can freeze this casserole before baking. Wrap it tightly with plastic wrap and aluminum foil, and freeze for up to 3 months. When ready to bake, thaw in the refrigerator overnight and bake as directed.

2. How do I store leftovers?

Store any leftovers in an airtight container in the refrigerator for up to 3-4 days. Reheat in the oven or microwave.

3. Can I use a different pasta?

Yes, you can substitute the egg noodles with spaghetti, fettuccine, or any pasta of your choice.

A Creamy, Hearty Casserole

This Beef Tetrazzini Casserole is a deliciously comforting dish that combines tender beef, creamy sauce, and cheesy goodness. It’s perfect for family dinners, meal prep, or potlucks. Enjoy this casserole with a side of salad or garlic bread for a complete meal!