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Filet Mignon Cast Iron
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5 from 3 votes

Filet Mignon in Mushroom Sauce

BEST Cast Iron Filet Mignon recipe in buttery mushroom sauce! 
Prep Time2 mins
Cook Time24 mins
resting time5 mins
Total Time26 mins
Course: Dinner
Cuisine: American
Keyword: Filet Mignon, Meat, Steak
Servings: 4 people
Author: Silvia


  • 4 pieces filet mignon
  • 2 cups baby bella mushrooms, sliced
  • 1 tbsp olive oil
  • 2 tbsp butter, unsalted
  • 2 cloves garlic, whole
  • 1 pinch sea salt flakes and fresh ground pepper, to taste
  • fresh thyme


  • Pre-heat oven to 425F degrees.
  • Heat oil and butter in cast iron. Add in mushroom slices, fresh thyme and garlic cloves. Stir a few times. Cook until golden (about 10-12 mins)
  • Meanwhile season filet mignon with sea salt flakes and fresh ground black pepper to taste.
  • When mushrooms are done remove from cast iron and reserve.
  • Add filet mignon to the cast iron and cook for 3 minutes on each side.
  • Then transfer to the oven and cook for 6 minutes.
  • Remove from oven and cover with foil for 5 minutes. After this resting time add mushroom in to the cast iron and serve.