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Sirloin Steak & Creamy Mushroom Sauce

Sirloin Steak & Creamy Mushroom Sauce

with Roasted Potato Rounds & Arugula Parmesan Salad

Recipe Development Team
Recipe Development TeamUpdated on December 23, 2025

Love a perfectly tender steak? The kind where the knife just sinks right through? Us too! Enter: our juicy, succulent sirloin is seared to perfection and elevated with a creamy, umami-rich mushroom sauce. Serve it alongside crispy roasted potato rounds and a fresh, peppery arugula salad for the luxe steakhouse-style dinner of your dreams.

Tags:
High Protein
Allergens:
Milk
Wheat

The quantities provided above are averages only.

Produced in a facility that processes eggs, milk, fish, peanuts, sesame, shellfish, soy, tree nuts, and wheat.

Total Time
Prep Time
DifficultyMedium
serving amount

3 tablespoon

Sour Cream

(Contains: Milk)

12 ounce

Sirloin Steak

1 unit

Croutons

(Contains: Wheat, Milk)

2 ounce

Arugula

12 ounce

Potatoes

4 ounce

Button Mushrooms

2 tablespoon

Cream Cheese

(Contains: Milk)

1 unit

Lemon

½ tablespoon

Italian Seasoning

3 tablespoon

Parmesan Cheese

(Contains: Milk)

1 unit

Tomato

1 tablespoon

Worcestershire Sauce

Not included in your delivery

1 teaspoon (tsp)

Olive Oil

1 tablespoon (tbsp)

Cooking Oil

1 tablespoon (tbsp)

Butter

(Contains: Milk)

teaspoon (tsp)

Salt

teaspoon (tsp)

Black Pepper

/ per serving
Calories840 kcal
Fat53 g
Saturated Fat21 g
Carbohydrate49 g
Sugar8 g
Dietary Fiber5 g
Protein45 g
Cholesterol175 mg
Sodium570 mg
Potassium1790 mg
Calcium280 mg
Iron4.8 mg
Due to the different suppliers we purchase our products from, nutritional facts per meal can vary from the website to what is received in the delivered box, depending on your region.
Baking Sheet
Large Bowl
Paper Towel
Large Pan
Small Bowl
Whisk

Cooking Steps

Roast Potatoes
1
  • Adjust rack to top position and preheat oven to 425 degrees. Drop cream cheese (in packet) into a glass of warm water to soften. Wash and dry produce.

  • Cut potatoes into ½-inch rounds.

  • Toss potatoes on a baking sheet with a drizzle of oil, salt, and pepper. Roast on top rack until browned and tender, 20-25 minutes.

Cook Steak
2
  • Pat steak* dry with paper towels; season all over with salt and pepper.

  • Heat a drizzle of oil in a medium pan over medium-high heat. Add steak and sear, turning occasionally, until browned all over, 4-8 minutes.

  • Turn off heat; transfer steak to a second baking sheet. Roast on middle rack until cooked to desired doneness, 8-10 minutes. Wipe out pan.

  • Transfer steak to a cutting board; let rest at least 8 minutes.

Prep
3
  • Meanwhile, dice tomato into ½-inch pieces. Lightly crush croutons in their bag. Trim and thinly slice mushrooms (skip if your mushrooms are pre-sliced!). Quarter lemon.

Assemble Salad
4
  • In a large bowl, combine arugula, tomato, Parmesan, and croutons (you’ll toss salad with dressing in Step 6).

Make Sauce
5
  • Heat a drizzle of oil in same pan used for steak over medium-high heat. Add mushrooms, half the Italian Seasoning (all for 4 servings), salt, and a pinch of pepper. Cook, stirring occasionally, until mushrooms are browned and slightly crispy, 2-4 minutes.

  • In a small bowl, whisk together cream cheese, sour cream, Worcestershire sauce, and ¼ cup water (⅓ cup for 4) until thoroughly combined.

  • Add cream cheese mixture and 1 TBSP butter (2 TBSP for 4) to pan with mushrooms. Bring to a simmer; cook, stirring constantly, until slightly thickened, 30-60 seconds. TIP: If sauce is too thick, add a splash of water.

  • Remove from heat; cover to keep warm.

Dress Salad
6
  • To bowl with salad, add a drizzle of olive oil, juice from two lemon wedges, salt, and pepper (large drizzle of olive oil and juice from four lemon wedges for 4 servings). Toss to combine.

Finish & Serve
7
  • Thinly slice steak against the grain.

  • Divide steak, roasted potato rounds, and salad between plates in separate sections. Spoon mushroom sauce over steak. Serve with remaining lemon wedges on the side.

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