Flat Iron Steak with Mushroom Sauce

Prep time: 20 min
Cook time: 35 min
Servings: 4
Yield: 4 servings

Description

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.

Ingredients

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

Directions

1 Preheat the oven to 325 degrees F (165 degrees C).
2 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.
3 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.
4 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.
5 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.
6 Stir cream into mushroom sauce until heated through, 1 to 2 minutes; pour over steak and garnish with chives.