Fillet Steak with Wild Mushrooms and Creamy Pan Sauce

This fillet steak dinner keeps things straightforward: a well-seared steak, a tangle of savory mushrooms, and a creamy pan sauce that comes together in the same skillet. It feels special without requiring a long ingredient list or complicated steps, which makes it a strong choice for date night, a dinner party, or a weeknight when you want something a little more polished.

Recipe at a glance

Yield: 2 servings
Prep time: 15 minutes
Cook time: 18 minutes
Rest time: 5 to 10 minutes
Total time: 35 to 40 minutes

Ingredients

• 2 fillet steaks, about 6 to 8 ounces each and 1 1/2 inches thick
• 1 teaspoon kosher salt, plus more to taste
• 1/2 teaspoon black pepper
• 1 tablespoon neutral oil, such as avocado or grapeseed
• 2 tablespoons unsalted butter, divided
• 8 ounces wild mushrooms or mixed mushrooms, cleaned and sliced or torn into bite-size pieces
• 1 small shallot, finely chopped
• 2 cloves garlic, minced
• 1 teaspoon fresh thyme leaves, or 1/4 teaspoon dried thyme
• 1/4 cup dry white wine or low-sodium beef stock
• 1/2 cup beef stock
• 1/3 cup heavy cream
• 1 teaspoon Dijon mustard
• 1 teaspoon Worcestershire sauce
• 1 tablespoon chopped parsley, for garnish
• Flaky salt, for finishing

Instructions

1. Take the steaks out of the refrigerator 20 to 30 minutes before cooking, if time allows. Pat them dry with paper towels. Season both sides with the kosher salt and black pepper.
2. Set a heavy skillet, preferably cast iron or stainless steel, over medium-high heat. Add the oil and 1 tablespoon of the butter. When the butter foams, add the steaks. Sear for 3 to 4 minutes on the first side without moving them, until a deep brown crust forms.
3. Flip and cook for 2 to 4 minutes on the second side, depending on thickness and your preferred doneness. For medium-rare, look for an internal temperature of about 125°F to 130°F before resting. The steak should feel springy but still give slightly when pressed. For medium, aim for 135°F. Transfer the steaks to a plate and rest for 5 to 10 minutes.
4. Lower the heat to medium. Add the remaining 1 tablespoon butter to the same skillet. Add the mushrooms and cook, stirring occasionally, for 5 to 7 minutes until they release their moisture, then brown and shrink a little.
5. Add the shallot and cook for 1 minute, then stir in the garlic and thyme for 30 seconds, just until fragrant.
6. Pour in the wine or stock to deglaze the pan, scraping up any browned bits from the bottom. Let it bubble for 1 to 2 minutes until reduced by about half.
7. Add the beef stock, cream, Dijon mustard, and Worcestershire sauce. Simmer gently for 2 to 4 minutes, stirring often, until the sauce lightly coats the back of a spoon. If it seems too thick, add a splash of stock. If it seems too thin, simmer a little longer.
8. Taste the sauce and adjust with a pinch of salt and pepper. Return any resting juices from the steak plate to the skillet for extra flavor.
9. Slice the steak against the grain, or serve whole if preferred. Spoon the mushrooms and creamy pan sauce over the top. Finish with parsley and a small pinch of flaky salt.

Tips

For the best crust, make sure the steaks are dry before they hit the pan. If you use a thinner fillet, shorten the sear time so the center stays tender. A meat thermometer helps here, especially if you like your steak at a specific doneness.

If you do not have wild mushrooms, cremini, baby bella, or a mix of sliced button mushrooms work well. You can also swap the cream for half-and-half, though the sauce will be a little lighter and less rich.

Serving ideas

This steak pairs beautifully with mashed potatoes, roasted potatoes, buttered noodles, or simple rice. For vegetables, try green beans, asparagus, sautéed spinach, or a crisp salad with a sharp vinaigrette to balance the creamy sauce. For a more elegant plate, spoon a little sauce on the base, set the steak on top, and scatter the mushrooms around the side.

Storage notes

Store leftovers in an airtight container in the refrigerator for up to 3 days. For the best texture, keep the steak and sauce together only if you plan to reheat gently. Warm the steak slowly in a skillet over low heat or in a 300°F oven just until heated through; avoid high heat, which can make the meat tough. Reheat the sauce separately over low heat, adding a splash of stock or water if needed to loosen it. Leftover sliced steak is also good tucked into a sandwich or served over toast the next day.

Sources

• USDA FoodData Central data documentation
• King Arthur Learn