Flat Iron Steak with Mushroom Sauce

This flat iron steak with mushroom sauce recipe is comprised of tender slices of flat iron steak served with a creamy, flavorful wine and mushroom sauce.

• Preparation Time: 20 mins
• Cooking Time: 35 mins
• Total Time: 55 mins
• Calories: 437 Calories

Ingredients

• 1 tablespoon butter, softened
• 1 tablespoon all-purpose flour
• 1 teaspoon freshly ground black pepper
• 2 tablespoons chopped fresh chives
• 1 cup beef stock
• 1 tablespoon vegetable oil, divided
• 1 (1 pound) flat iron steak
• 0.5 cup heavy whipping cream
• 0.5 teaspoon garlic powder
• 0.5 teaspoon onion powder
• 1.5 teaspoons kosher salt
• 0.5 cup Burgundy wine
• 0.5 pound cremini mushrooms

Recipe Instructions

Step 1

Preheat the oven to 325 degrees F (165 degrees C).

Step 2

Stir cream into mushroom sauce until heated through, 1 to 2 minutes; pour over steak and garnish with chives.

Step 3

Season both sides flat iron steak with salt, black pepper, garlic powder, and onion powder. Heat a heavy, oven-proof skillet over medium-high heat; add 2 teaspoons vegetable oil and heat until oil shimmers. Add steak; sear until well browned, about 3 minutes per side. Transfer steak to a plate.

Step 4

Reduce heat to medium; add remaining 1 teaspoon vegetable oil to skillet. Add mushrooms; cook and stir until wilted and browned, about 10 minutes. Reduce heat to medium-low; add wine to skillet and bring to a boil. Cook until wine is slightly reduced, 3 to 5 minutes; add beef stock and bring to a simmer.

Step 5

Mash butter and flour in a small bowl into a paste using a fork; stir into mushroom mixture and simmer until sauce is thickened, about 5 minutes. Return flat iron steak to the skillet.

Step 6

Cook in the preheated oven until steak is barely pink inside, about 10 minutes. Cut steak into thin slices on the diagonal against the grain; place on a platter.