Flat Iron Steak with Mushroom Sauce

Flat Iron Steak with Mushroom Sauce


"A wonderful beefy flavored and inexpensive company-worthy flat iron steak with a creamy mushroom sauce. Wonderful served over roasted potatoes or a rice pilaf."
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55 m servings 437 cals
Serving size has been adjusted!

Original recipe yields 4 servings



  • Calories:
  • 437 kcal
  • 22%
  • Fat:
  • 30.7 g
  • 47%
  • Carbs:
  • 6.8g
  • 2%
  • Protein:
  • 27.9 g
  • 56%
  • Cholesterol:
  • 126 mg
  • 42%
  • Sodium:
  • 870 mg
  • 35%

Based on a 2,000 calorie diet

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Nutritional Information

1 Serving
Servings Per Recipe:
Amount Per Serving
  • * Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
  • ** Nutrient information is not available for all ingredients. Amount is based on available nutrient data.
  • (-) Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.

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  • Prep

  • Cook

  • Ready In

  1. Preheat oven to 325 degrees F (165 degrees C).
  2. Sprinkle both sides of flat iron steak with salt, black pepper, garlic powder, and onion powder. Heat a heavy, oven-proof skillet over medium-high heat, pour 2 teaspoons vegetable oil into the hot skillet, and heat until oil shimmers. Sear steak in the hot oil until well browned, about 3 minutes per side. Remove steak from pan and reduce heat to medium.
  3. Pour 1 more teaspoon vegetable oil into skillet; cook and stir cremini mushrooms in hot oil until wilted and browned, about 10 minutes. Lower heat to medium-low; pour wine into mushrooms and bring to a boil. Cook until wine is slightly reduced, 3 to 5 minutes; add beef stock to vegetable mixture. Bring mixture to a simmer.
  4. Stir butter and flour into a paste in a small bowl, using a fork. Stir flour paste into mushroom mixture and simmer until sauce is thickened, about 5 minutes. Place flat iron steak into skillet with mushroom sauce.
  5. Place skillet in preheated oven and cook until steak is barely pink inside, about 10 minutes. Cut steak into thin slices on the diagonal and place meat on a platter.
  6. Stir cream into mushroom sauce until heated through, 1 to 2 minutes; pour over steak and garnish with chives.



This is a nice recipe for flat iron steak. I did, however, cut back on the amount of liquids in the sauce (to 1/2 the stated amounts) and skipped the flour entirely. I prefer my sauces without...

Made this recipe as listed and my family really liked it. The sauce is quite yummy and certainly worth making again. The recipe lists ingredients of heavy whipping cream and chives, but nowher...

Followed the recipe to a tee it was great the whole family loved it.

This was my two favorite things - easy and delicious. I made a couple changes though because I only used what I had on hand. First, I used deer tenderloin instead of beef and second, I used po...

Tried this recipe tonight. I substituted the cremini mushrooms with portobello's because that's what I had on hand. Anyway, the cremini is a baby portobello mushroom I have learned. Also, I use...

This is soooo good have made it several times to serve over many different dishes including meat loaf so good thanks for sharing this one will be passed on and on

Great recipe. Easy and flavorful. Will make again.

This was delicious