• 2 TB spoon oil
• 2 New York strip steaks, room temperature, trimmed and seasoned with salt and pepper
• 8 oz mushrooms, sliced
• 1/4 cup sliced shallots
• 1/4 cup sherry
• 2/3 cup beef stock
• 2 teaspoon minced fresh rosemary
• 2 TB spoons sour cream
• 1 teaspoon cornstarch

• Heat a cast-iron skillet over medium-high until very hot.
• Add 1 TB spoon oil, swirl to coat.
• Sear steaks 6-7 minutes per side for medium-rare; transfer to a plate and tent with foil.
• Add remaining 1 TB spoon oil, mushrooms, and shallots to skillet.
• Season with salt and cook until mushrooms begin to brown, 3-5 minutes.
• Deglaze skillet with sherry, scraping up any brown bits; cook until nearly evaporated.
• Stir in stock, rosemary, and residual steal juices; simmer until reduced to 1/2 cup.
• Whisk together sour cream and cornstarch.
• Whisk into sauce and reduce heat to low.
• Simmer sauce until thickened; season with salt and pepper.
• Serve steaks with sauce.

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