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  • Writer's pictureJJ Bison

Flat Iron Bison Steak With Mushroom Sauce

This beautiful flat iron steak was fantastically easy and tasted just as good as it looks. We made this steak because we already had everything in our pantry and refrigerator, which means there's a good chance you already have these items in your kitchen, or can get them easily from your local grocery store. There are very few ingredients for this mouth-watering taste. We'll also throw in a quick substitution in case you need more options.


  • Flat iron bison steak (1 pound, divided into 8oz steaks)

  • 1 ½ teaspoon salt

  • 1 teaspoon freshly ground black pepper

  • ½ teaspoon garlic powder (or 1 clove of garlic)

  • ½ teaspoon onion powder

  • 1 tablespoon vegetable oil, and 1 teaspoon vegetable oil

  • ½ pound portobello mushrooms

  • ½ cup red wine

  • 1 cup beef stock

  • 1 tablespoon butter, softened

  • 1 tablespoon all-purpose flour

  • ½ cup heavy whipping cream (1/8 cup melted butter and 1/4 cup plus 2 tablespoons, or 6 tablespoons if you don't have ½ cup heavy whipping cream)


  1. Heat skillet to medium-high

  2. Sprinkle all sides of the steak with salt, pepper, garlic, and onion powder.

  3. Add the 1 tablespoon vegetable oil to the pan until heated.

  4. Sear the steak in the oil until and flip the steak, then turn down the heat to medium and cover with a lid.

  5. In a skillet on medium, add 1 teaspoon vegetable oil and stir in the mushrooms until browned (this way everything is done at the same time!)

  6. When the steak reaches ~5 degrees less than what you want, remove the steak and place it under foil to rest the steak (see references for temperatures below).

  7. Add the red wine into the mushroom mix and bring it to a boil until the wine is reduced, then add the beef stock and bring the mixture to a simmer.

  8. In a bowl, melt the butter, then add the flour until it forms a paste.

  9. Stir the paste into the sauce until thickened, about 5 minutes.

  10. Stir the cream into the mushroom sauce and let it sit for about 2 minutes.

  11. Place the steak on a plate and pour over the mushroom sauce.

  12. Enjoy!

Rare: 115-120 degrees Medium Rare: 121-129 degrees Medium: 129-135 degrees


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