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Filet Mignon with Sherry Mushroom Sauce
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5 from 1 vote

Filet Mignon With Sherry Mushroom Sauce

Prep Time5 mins
Cook Time25 mins
Resting time5 mins
Total Time30 mins
Course: Main Course
Cuisine: American
Keyword: Beef, filet mignon, tenderloin
Servings: 2
Author: Melissa Reome


  • Skillet (such as stainless steel or carbon steel)
  • instant read thermometer
  • Stove, Oven or Grill


  • 2 10 oz Filet mignon (or desired size steaks)
  • 1 medium Shallot minced
  • 1/2 Bell pepper any color, small dice
  • 8 oz Mushrooms white button or baby bella
  • 1/2 stalk celery small dice
  • 2 tbsp butter unsalted
  • 3/4 cup dry sherry or cream sherry do not use cooking sherry
  • 1 cup chicken stock may substitute chicken broth
  • 3 sprigs fresh thyme leaves removed from stems
  • 1 clove fresh garlic minced
  • 2 tbsp ghee or oil such as extra light olive oil, canola (for searing steak)
  • 1 tbsp cornstarch
  • salt and pepper to taste


  • Remove steaks from refrigerator 30 minutes prior to cooking. Season liberally with kosher or sea salt on both sides. Allow steaks to come to room temperature. Pat surface of steaks dry with a paper towel prior to searing.
  • Heat grill to high heat or approximately 450F. Once grill is up to temperature, place skillet in grill and allow skillet to heat thoroughly. If cooking indoors, pre-heat skillet to medium-high heat. Add oil for searing once skillet is hot and carefully place steaks in skillet and sear for a couple minutes or two until nicely browned on both sides. Only flip the steak once. If the pan does not sizzle nicely when you put the steak in, it is not hot enough. Remove steaks from skillet. You will use that skillet for the sauce.
    Searing filet mignon in Skiller
  • If finishing steaks in the oven, place steaks in a pre-heated 375°F oven and cook until approximately 10-15 minutes or until 5°F shy of desired finished temperature. Finished temperature for med-rare 130-135°F, medium 140-145°F, med-well 150-155°F, well done 160°F. For example, if you desire a med-rare steak pull at 130F because the temperature will rise during the 5 minute rest period. If cooking steaks on the grill, finish cooking the steaks in the skillet first, then set meat aside to rest (tent loosely with foil) and keep warm while using the same skillet to make sauce.
    Seared Filet Mignon
  • In the same skillet you seared the steaks add butter and sauté celery first as that takes the longest to cook. Cook until it is tender. Add peppers and sauté until tender. Add mushrooms and cook until lightly browned and most of the water has evaporated. Add shallots and garlic then cook until transluecent approximately 1 minute. Add sherry to skillet to deglaze pan. Stir to scrape off brown bits on bottom of skillet into sauce. Add chicken stock. Continue to cook for 2-3 minutes.
    Sautéing vegetables for sauce
  • Make cornstarch slurry to thicken sauce. Miix 1 tbsp cornstarch with 1 tbsp of COLD water until thoroughly incorporated. Push vegetables in skillet to one side and add one-half of slurry to liquid and whisk . Stir into rest of skillet ingredients. Cook for 1 minute until sauce thickens. If sauce is not thick enough, add a bit of the remaining slurry. You want the sauce to coat the back of a spoon, not be thick like gravy.
    Move vegetables to side of skillet and add cornstarch slurry into liquid
  • Place steak on a plate and serve with sauce on top. Serve immediately.
    Filet Mignon with Sherry Mushroom Sauce


Cook time will depend on the size of the filet mignon or other cut of steak you cook.  I highly recommend using a quality instant read thermometer such as a one from Thermoworks.  Measuring the internal temperature of meat when cooking is the most accurate way to get a consistent result every time.