This Steak Spaghetti with Mushrooms and Onions in Cream Sauce is a rich, comforting pasta dish made with tender steak, sautéed mushrooms, caramelized onions, and a creamy garlic sauce. Perfect for an indulgent weeknight dinner.

Steak Spaghetti with Mushrooms and Onions in Cream Sauce

If you love hearty, restaurant-style pasta dishes, this Steak Spaghetti with Mushrooms and Onions in Cream Sauce is a must-try. It combines juicy strips of steak with earthy mushrooms, sweet caramelized onions, and a rich, creamy garlic sauce that coats every strand of spaghetti perfectly.

This dish is ideal for a cozy dinner at home when you want something comforting, flavorful, and satisfying without complicated steps.

Why You’ll Love This Recipe

Rich and creamy flavor
Tender, juicy steak
One-pan sauce for easy cleanup
Perfect comfort food
Restaurant-quality at home
Ready in under an hour

Preparation Time

Prep Time: 15 minutes
Cook Time: 30 minutes
Total Time: 45 minutes

Servings

Serves 4

Ingredients

For the Pasta

12 ounces spaghetti
Salt for boiling water

For the Steak

1 pound steak (sirloin, ribeye, or flank), thinly sliced
1 tablespoon olive oil
1/2 teaspoon salt
1/2 teaspoon black pepper
1 teaspoon Worcestershire sauce

For the Sauce

2 tablespoons butter
1 medium onion, thinly sliced
2 cups mushrooms, sliced
3 cloves garlic, minced
1 cup heavy cream
1/2 cup beef broth
1/2 cup grated Parmesan cheese
1 teaspoon Italian seasoning
1/4 teaspoon crushed red pepper flakes (optional)
Salt and pepper to taste

For Garnish

Fresh parsley, chopped
Extra Parmesan cheese

Equipment Needed

Large pot
Large skillet or pan
Knife and cutting board
Wooden spoon or spatula
Strainer

Step-by-Step Directions

Step 1: Cook the Spaghetti

Bring a large pot of salted water to a boil.

Cook spaghetti according to package instructions until al dente.

Drain and set aside, reserving 1/2 cup pasta water.

Step 2: Cook the Steak

Heat olive oil in a large skillet over medium-high heat.

Season steak with salt, pepper, and Worcestershire sauce.

Sear steak slices for 2–3 minutes until browned but still tender.

Remove from the pan and set aside.

Step 3: Sauté Onions and Mushrooms

In the same skillet, melt butter.

Add sliced onions and cook for 5–7 minutes until soft and slightly caramelized.

Add mushrooms and cook for another 4–5 minutes until browned.

Stir in garlic and cook for 30 seconds until fragrant.

Step 4: Make the Cream Sauce

Pour in beef broth and stir to deglaze the pan.

Add heavy cream, Italian seasoning, and red pepper flakes.

Simmer for 3–5 minutes until slightly thickened.

Stir in Parmesan cheese until melted and smooth.

Step 5: Combine Steak and Pasta

Return the cooked steak to the skillet.

Add cooked spaghetti and toss to coat in the creamy sauce.

Add a splash of reserved pasta water if needed to loosen the sauce.

Step 6: Finish and Serve

Taste and adjust seasoning with salt and pepper.

Garnish with fresh parsley and extra Parmesan cheese.

Serve hot.

Serving Suggestions

This dish pairs well with:

Garlic bread
Caesar salad
Roasted vegetables
A light green salad

Recipe Tips

Slice steak thinly for tenderness
Don’t overcook the steak to keep it juicy
Use fresh mushrooms for best flavor
Add pasta water to adjust sauce thickness
Parmesan helps naturally thicken the sauce

Storage Instructions

Store leftovers in an airtight container in the refrigerator for up to 3 days.
Reheat gently on the stove or microwave with a splash of milk or broth to revive the sauce.

Final Thoughts

Steak Spaghetti with Mushrooms and Onions in Cream Sauce is a rich, comforting pasta dish that brings together bold flavors and creamy texture in every bite. With tender steak, savory mushrooms, and a silky sauce, it’s a perfect recipe for a cozy homemade dinner that feels like restaurant-quality comfort food.