Beef Tetrazzini Casserole Recipe – The Best Creamy Beef Pasta Bake

If you love classic comfort food that’s rich, creamy, and perfect for a crowd, you’ll adore this Beef Tetrazzini Casserole. Tender slices of beef sirloin, hearty egg noodles, and a luscious mushroom cream sauce come together in one irresistible baked dish.

This easy beef casserole recipe is ideal for family dinners, potlucks, or meal prepping. Let’s dive into everything you need to make this satisfying dinner.

 Why You’ll Love This Beef Tetrazzini

Creamy & flavorful – a rich sauce coats every bite
Feeds a crowd – perfect for sharing
Make ahead friendly – prep and bake later
Customizable – add your favorite veggies
Comfort food at its finest

 Ingredients You’ll Need

Gather these simple, wholesome ingredients:

• 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

• 1/2 cup sour cream

• 1 cup grated Parmesan cheese, divided

• 1/2 cup grated mozzarella cheese

• 1/4 cup all-purpose flour

• 2 tablespoons butter

• Salt and pepper, to taste

• 2 tablespoons fresh parsley, chopped for garnish

 How to Make Beef Tetrazzini Casserole – Step by Step

Follow these directions to create the perfect creamy casserole:

 Step 1 – Preheat Your Oven

Set your oven to 350°F (175°C) so it’s ready when your casserole is assembled.

 Step 2 – Cook the Noodles

Cook the egg noodles according to the package instructions until al dente.
Drain and set aside.

 Step 3 – Brown the Beef

Heat olive oil in a large skillet over medium-high heat.
Add the sliced beef sirloin and cook for 3–4 minutes, until browned.
Remove the beef and set aside.

 Step 4 – Sauté the Aromatics

In the same skillet, melt the butter over medium heat.
Add the onion and garlic and cook until translucent, about 3–4 minutes.

 Step 5 – Cook the Mushrooms

Add the sliced mushrooms to the skillet.
Cook for 5 minutes, stirring occasionally, until tender and lightly browned.

 Step 6 – Create the Roux

Sprinkle the flour evenly over the vegetables.
Stir well and cook for 1 minute to remove the raw flour taste.

 Step 7 – Make the Sauce

Gradually pour in the beef broth, stirring constantly to avoid lumps.
Cook for 2–3 minutes, until the sauce begins to thicken.

 Step 8 – Add Creams & Cheese

Reduce heat to low. Stir in:

• Heavy cream

• Sour cream

• ½ cup of Parmesan cheese

Season with salt and pepper to taste.

 Step 9 – Combine Beef & Sauce

Return the cooked beef to the skillet.
Simmer 2–3 minutes until the beef is heated through and coated in sauce.

 Step 10 – Mix with Noodles

In a large mixing bowl, combine:

• Cooked noodles

• Beef and sauce mixture

Toss gently to coat everything evenly.

 Step 11 – Assemble the Casserole

Transfer the mixture to a greased 9×13 inch baking dish.
Sprinkle the top with:

• Remaining ½ cup Parmesan cheese

• ½ cup mozzarella cheese

 Step 12 – Bake

Bake in your preheated oven for 25–30 minutes, or until the top is golden brown and bubbling.

 Step 13 – Garnish and Serve

Remove from the oven.
Sprinkle with fresh chopped parsley before serving.

Enjoy this comforting dish hot!

 Serving Suggestions

This rich casserole pairs well with:

• A crisp green salad

• Steamed broccoli or green beans

• Warm garlic bread

It also makes fantastic leftovers for lunch the next day.

 Variations & Tips

Here are some easy ways to adapt this Beef Tetrazzini Casserole to your taste:

Lighter Version: Use half-and-half or whole milk instead of heavy cream (the sauce will be thinner).
Extra Veggies: Stir in frozen peas, chopped spinach, or bell peppers for more nutrients.
Gluten-Free: Use gluten-free pasta and swap flour with cornstarch as a thickener.
Crunchy Topping: Combine breadcrumbs with melted butter and sprinkle over the cheese before baking for added texture.
Cheese Swap: Try Gruyère or cheddar for a different flavor profile.

 Expert Tips

• Don’t overcook the noodles. They will continue to cook in the oven.

• Slice the beef thinly. This ensures tender bites that cook quickly.

• Taste the sauce. Season before combining with noodles to ensure balanced flavor.

• Make ahead. Assemble the casserole and refrigerate up to 24 hours before baking.

 Frequently Asked Questions

Can I freeze Beef Tetrazzini Casserole?
Yes! Assemble the casserole without baking. Wrap tightly in foil and freeze for up to 3 months. Thaw overnight in the refrigerator and bake as directed.

What cuts of beef work best?
Beef sirloin is tender and cooks quickly, but you can also use flank steak or leftover roast beef.

 Final Thoughts

This Beef Tetrazzini Casserole is an easy, satisfying meal the whole family will love. With tender beef, savory mushrooms, and a creamy sauce blanketing every noodle, it’s the ultimate comfort food.

Try this recipe today and see why it’s a dinner favorite. Don’t forget to leave a comment and let us know how it turned out!

enjoy!