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Keto Filet Mignon with Mushroom and Mustard Sauce - 19
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5 from 2 votes

Keto Filet Mignon with Mushroom and Mustard Sauce

This Keto Filet Mignon with Mushroom Sauce is creamy, savory and restaurant-quality but easy to make at home for a low-carb dinner.
Course dinner
Cuisine American, French
Prep Time 12 minutes
Cook Time 28 minutes
Total Time 40 minutes
Servings 4
Calories 731kcal
Author Mihaela

Equipment

Ingredients

  • 2 tbsp olive oil divided
  • 4-6 filet mignon steaks (about 1 1/2" thick, 4-ounce each), at room temperature
  • 1 tbsp butter
  • 1 yellow onion finely diced
  • 2-4 medium garlic cloves minced
  • 1 container (14oz / 400g) baby brown mushrooms cleaned
  • 1/2 cup low-sodium beef broth
  • 2/3 cup heavy cream
  • 1 1/2 tbsp mustard
  • 2 tbsp fresh curly parsley chopped
  • Sea salt and ground pepper to taste

Instructions

  • Heat 1 tablespoon of oil in a large skillet over medium-high heat.
  • Add in the beef filets and cook undisturbed for 3-4 minutes on each side. Set aside and cover to keep warm.
  • Add the remaining oil and butter to the skillet.
  • Once the butter is foamy, add the onion and sauté for 3-4 minutes until softened.
  • Stir in the garlic and mushrooms. Cook, stirring occasionally for about 5 minutes, or until the mushrooms are tender.
  • Add the broth to deglaze the pan, stirring to remove all the brown bits stuck at the bottom.
  • Simmer until the broth is absorbed, about 5-6 minutes. Stir in the cream and mustard.
  • Return the steak to the pan and heat it up for a couple of minutes.
  • Remove from heat, sprinkle with fresh parsley and serve.

Video

Notes

Here is a summary of the best Tips & Tricks for my Keto Fillet Mignon Recipe:
  1. Tip #1 details the ingredients you can swap in the recipe.
  2. See Tip #2 for the best way to cook this tasty keto steak with mushroom sauce.
  3. If you want to make it on the grill, be sure to read Tip #3. 
  4. Tip #4 is about how to fry fillet mignon.
  5. See Tip #5 for how to season your fillet for grilling. 
  6. And if you have time to marinate the steak, read Tip #6 for a keto-friendly recommendation.

Nutrition

Calories: 731kcal | Carbohydrates: 9g | Protein: 35g | Fat: 62g | Saturated Fat: 27g | Trans Fat: 1g | Cholesterol: 181mg | Sodium: 258mg | Potassium: 1117mg | Fiber: 1g | Sugar: 3g | Vitamin A: 844IU | Vitamin C: 5mg | Calcium: 72mg | Iron: 5mg