Pork tenderloin with mustard sauce: tender meat and creamy sauce

I make this pork tenderloin with mustard sauce when I'm craving a "bistro-style" dish at home without spending all afternoon in the kitchen. It's a classic: you sear the meat to infuse it with flavor, deglaze the pan, then let the sauce simmer gently with the mustard and cream. The result: tender meat and a sauce that clings beautifully to pasta, mashed potatoes… or simply a good piece of bread.

The mustard here isn't meant to be spicy. Its main purpose is to enhance and add body to the sauce. I like to use Dijon mustard for its character, and wholegrain mustard for a smoother texture (the grains are the little touch that makes all the difference without betraying tradition). The button mushrooms and onions tie everything together: they add flavor, a creamy texture, and a satisfying garnish.

Technically speaking, it's quite simple: the key is to brown the tenderloin well at the beginning (that's where the flavor develops), then cook it gently so it doesn't dry out. And if you have a couple of extra minutes, let the meat rest before slicing it: this way you'll keep all the juices inside.

Nutritionally, you get a good portion of protein and a rich but manageable sauce if you use plenty of cream. The mushrooms add fiber and micronutrients without making it heavy. If you like, serve it with green beans or a medley of vegetables for easy balance.

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Pork tenderloin with mustard

Recipe by Nathalie Laplace

5.0 based on 1 vote(s)

Type of dish: main courseKitchen: FrenchDifficulty: easy

Parts

4

parts

Preparation time

30

minutes

Cooking time

40

minutes

Calories

300

kcal

Total time

1

hour 

10

minutes

A perfectly seared filet mignon, topped with a mild and tangy mustard-cream sauce, with meltingly soft mushrooms and onions. A classic French dish, simple, quick, and always a winner.

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Ingredients

• 1 pork tenderloin (approx. 650g)

• 250g of button mushrooms

• 2 yellow onions

• 2 garlic cloves

• 2 tablespoons of Dijon mustard (approx. 30g)

• 1 tablespoon of wholegrain mustard (approx. 15g)

• 20 cl of full-fat fresh cream (approx. 200g)

• 10 cl of chicken stock (approx. 100ml)

• 10 cl of dry white wine (approx. 100ml)

• 1 tablespoon of neutral oil (approx. 10g)

• 20g of butter

• 1 sprig of thyme

• 1 bay leaf

• Fine salt

• Black pepper

Instructions

• Remove the filet mignon from the refrigerator 10 minutes before cooking. Pat it dry with paper towels, then season with salt and pepper.
• Finely chop the onions. Mince the garlic. Clean the mushrooms and slice them.
• In a large skillet, heat the oil and butter over medium-high heat. Sear the tenderloin for 2 to 3 minutes per side, until nicely browned. Transfer it to a plate.
• In the same skillet, reduce the heat to medium. Add the onions with a pinch of salt and cook them for 5 minutes, scraping up any browned bits from the bottom of the pan (that's where the flavor is hidden). Add the garlic and stir for 30 seconds.
• Add the mushrooms and sauté for 5 to 7 minutes, until they release their water and begin to brown slightly.
• Deglaze with white wine: pour it in all at once and scrape the bottom well. Let it reduce for 2 minutes.
• Add the stock, thyme, and bay leaf. Return the tenderloin to the pan. Partially cover and simmer gently for 12 to 15 minutes, turning the meat halfway through. (The goal is to cook it to just pink in the center, not dry.)
• Remove the meat to a cutting board and let it rest for 5 minutes. Meanwhile, remove the thyme and bay leaf.
• Reduce the heat to low. Stir in both mustards, then the cream. Mix well and let it thicken for 2 to 3 minutes without boiling vigorously (otherwise the sauce may curdle). Taste and adjust the seasoning with salt and pepper.
• Slice the filet mignon into medallions. Return them to the sauce for 1 minute to coat them, then serve piping hot with the mushrooms and onions.

📊 Nutritional Information

1 serving (approx. 320g)

* RDA = Recommended Daily Allowance

📝 Notes

If your sauté pan sticks a little when you deglaze, that's normal: these caramelized juices are exactly what gives it that "brasserie" flavor. Scrape well, but don't try to lift the pan.

💡 Chef's Tips

For a perfectly smooth sauce: keep the heat low after adding the mustard and cream. And for juicier meat, let it rest for 5 minutes before slicing.

🔄 Variations

• Add 1 tablespoon of cognac right after the white wine, let it evaporate for 30 seconds before adding the broth.
• Replace the chicken stock with vegetable stock if that's what you have; the dish remains very true to the spirit of the dish.

Nathalie Laplace

Food writer for the Simple & Bon website. Passionate about healthy cooking and especially salads, slow-cooked or oven-baked recipes.