Wild mushroom steak is a French-style pan-seared steak served with seasonal mushrooms, cognac, red wine, and a glossy veal demi-glace sauce. What makes this version different is the combination of cèpes and black trumpet mushrooms, which gives the sauce a deep, earthy flavor without using cream. I make it this way when I want a restaurant-style steak dinner that feels generous, rustic, and elegant at the same time.

This recipe is based on my YouTube video, with a few adjustments since publication. I clarified the mushroom quantities, steak temperatures, sauce reduction, and potato method so the recipe is easier to reproduce at home in Canada and the USA.

This is not the same as a creamy mushroom steak. For a richer, creamier version, I already have a creamy mushroom sauce for steak. This one is more rustic and concentrated, with wild

Wild Mushroom Steak with Cèpes, Black Trumpets, and Crispy Potatoes

mushrooms, red wine, cognac, and a reduced veal stock sauce. It is also different from Steak Diane with cognac mushroom sauce, which has a smoother, slightly creamy steakhouse profile.

Why I Make It This Way

I prefer to cook this dish in layers because each part needs its own timing. The potatoes take the longest, so I start with them. The steak needs a very hot pan and a short rest. The sauce is built last in the same pan so the mushrooms, cognac, red wine, and veal stock pick up the browned flavor from the steak.

I also prefer to use a strong demi-glace or reduced veal stock instead of regular stock. A thin stock will make the sauce watery. A reduced stock gives the sauce body, shine, and that classic French restaurant finish without needing heavy cream.

The cèpes bring a meaty, nutty flavor, while black trumpet mushrooms bring a darker, earthy note. Together, they make this dish taste seasonal in the fall, but the recipe still works year-round if you use dried wild mushrooms or a mix of fresh grocery-store mushrooms.

Ingredients

For the Steaks

3 thick Angus beef steaks, 10 to 14 oz each
1 to 2 tbsp duck fat, for searing
Kosher salt, to taste
Black pepper, to taste

For the Wild Mushroom Sauce

10 oz fresh cèpes or porcini-style mushrooms, cleaned and sliced thickly
4 oz fresh black trumpet mushrooms, cleaned
2 shallots, thinly sliced
2 garlic cloves, thinly sliced
3 tbsp cognac
1/2 cup red wine
3/4 to 1 cup reduced veal stock or demi-glace
1 to 1 1/2 tbsp cold butter, optional
2 tbsp chopped flat-leaf parsley
Kosher salt, to taste
Black pepper, to taste

For the Potatoes

1 1/2 to 1 3/4 lb Charlotte potatoes, Yukon Gold potatoes, or small waxy potatoes
6 cups water
1 tbsp kosher salt, for the blanching water
2 to 3 tbsp duck fat
1 tbsp chopped flat-leaf parsley
Black pepper, to taste
Salt, to finish

Step-by-Step Instructions

1. Slice and Blanch the Potatoes

Slice the potatoes about 1/8 inch thick. A mandoline makes this easier and gives even slices, but a sharp knife works too.

Bring the water to a boil and add the salt. Add the potato slices and blanch for 1 minute only. This is not meant to fully cook the potatoes. It simply removes surface starch so they do not stick together too much in the pan.

Drain the potatoes very well and let them steam-dry for a few minutes. This step matters. If the potatoes are too wet, they will steam instead of browning.

2. Cook the Potatoes Slowly in Duck Fat

Heat a wide skillet over medium-high heat. Add the duck fat, then add the drained potatoes. Spread them out as much as possible.

Cook for 30 to 40 minutes, turning often, until the potatoes are golden, tender, and lightly crisp around the edges. Lower the heat if they brown too quickly before the inside is tender.

I prefer to season them near the end so the potatoes keep their texture. Finish with parsley, black pepper, and a little salt. Keep warm while you cook the steak.

If you love potato sides with steak, this method sits somewhere between pan-fried potatoes and the more classic layered style of pommes boulangères. For another steakhouse-style side, Parisian potatoes with bacon, garlic, and mushrooms also work very well.

3. Prepare the Mushrooms and Aromatics

Clean the cèpes carefully with a brush or damp towel. Trim the stems if needed, then cut them into thick pieces. Do not cut them too small because they shrink as they cook.

Clean the black trumpet mushrooms carefully because they can hold sand or dirt. Tear larger pieces by hand if needed.

Thinly slice the shallots and garlic. Chop the parsley and reserve it for the end.

4. Sear the Steaks

Pat the steaks dry with paper towel. Season generously with salt and pepper.

Heat a heavy skillet over high heat until very hot. Add the duck fat. Sear the steaks for about 2 minutes per side, then continue cooking while turning every minute or so until they reach your preferred doneness.

For best results, use a thermometer:

Rare: 120°F to 125°F
Medium-rare: 130°F to 135°F
Medium: 140°F to 145°F

Remove the steaks from the pan and let them rest for 5 to 8 minutes. Resting keeps the juices inside the meat and gives you time to build the sauce.

This flip-often method gives good color and more even cooking, similar in spirit to my pan-seared steak au poivre. If you want a simpler steak with no mushroom reduction, steak with maître d’hôtel butter is the cleaner, faster option.

5. Cook the Mushrooms

Keep the same pan on medium-high heat. If the pan is dry, add a small spoonful of duck fat.

Add the cèpes first and cook until they begin to brown. Add the black trumpet mushrooms, shallots, and garlic. Cook until the shallots soften and the mushrooms smell deep and savory.

Do not rush this step. Mushrooms need enough heat to lose moisture and develop flavor. If the pan is crowded, cook them in batches.

6. Build the Sauce

Deglaze the pan with cognac. Let it reduce until most of the alcohol smell has cooked off.

Add the red wine and reduce again until the liquid is concentrated. This step is important because it removes harshness and gives the sauce better balance.

Add the reduced veal stock or demi-glace. Simmer until the sauce is glossy and coats the mushrooms. Taste and adjust with salt and pepper.

For extra shine, remove the pan from the heat and whisk in the cold butter. This is optional, but it gives the sauce a smoother finish.

This sauce is close to the French steakhouse family, but it is not as creamy as Sauce Diane and not as sharp as Dijon mustard steak. It is more about wild mushroom depth and reduced stock.

7. Serve

Place the rested steaks on warm plates. Spoon the wild mushroom sauce over and around the meat. Serve with the duck-fat potatoes on the side.

Finish with a little chopped parsley. The dish is rich, protein-forward, and hearty, so it pairs best with a simple vegetable or a crisp salad.

Substitutions

If you cannot find fresh cèpes, use fresh porcini-style mushrooms, cremini mushrooms, shiitake, oyster mushrooms, or king oyster mushrooms. The flavor will be different, but the recipe will still work.

If you cannot find fresh black trumpet mushrooms, use a dried wild mushroom mix. Rehydrate the mushrooms in warm water, drain well, and chop if needed. A little strained soaking liquid can be added to the sauce, but reduce it well so it does not dilute the flavor.

If you do not have duck fat, use clarified butter or a neutral high-heat oil. Duck fat gives the best flavor for the potatoes, but the recipe is still good without it.

If you do not have demi-glace, reduce a good beef or veal stock until it is stronger and slightly syrupy. Do not use thin boxed stock straight from the carton unless you reduce it first.

If you prefer a creamy sauce, add a small splash of heavy cream at the end, but that will make the dish closer to a creamy mushroom steak. For a full creamy version, use my steak with creamy mushroom sauce instead.

FAQ

Can I use dried mushrooms?

Yes. Use about 1 to 1 1/2 oz dried wild mushrooms for this recipe. Rehydrate them in warm water for 20 to 30 minutes, then drain well. Strain the soaking liquid through a fine sieve or coffee filter before using any of it in the sauce.

What cut of steak works best?

Ribeye, striploin, sirloin, filet mignon, or thick-cut entrecôte all work. The most important detail is thickness. A steak that is 1 1/4 to 1 1/2 inches thick is much easier to sear properly without overcooking.

Can I make the potatoes ahead?

You can blanch the potatoes ahead, drain them, and keep them in the fridge for a few hours. For best texture, fry them shortly before serving.

Can I make the sauce without alcohol?

Yes. Replace the cognac and red wine with extra reduced stock and a small splash of balsamic vinegar or red wine vinegar. Use only a little vinegar so the sauce does not become sour.

Is this recipe seasonal?

It is best in fall when wild mushrooms are in season, especially in Canada and the northern USA. But it works year-round with dried mushrooms or a mix of fresh mushrooms from the grocery store.

How is this different from Steak Diane?

Steak Diane is usually more polished, lightly creamy, and built with mustard, stock, mushrooms, and cognac. This wild mushroom steak is earthier, darker, and more rustic because the sauce is based on cèpes, black trumpets, red wine, and demi-glace.

What to Serve With Wild Mushroom Steak

This steak already includes crispy potatoes, but it also works well with simple sides. For a classic bistro direction, serve it with steak frites and béarnaise sauce inspiration and keep the plate simple.

For another potato option, try air fryer roasted potatoes if you want something faster and less rich than duck-fat skillet potatoes.

For a more comforting plate, cauliflower and potato gratin works well, especially in colder months.

If you want to stay in the steakhouse sauce family, compare this dish with steak with Roquefort sauce, flank steak with creamy Roquefort sauce, or Camembert steak sauce.

For a different beef and mushroom dinner that feels more weeknight-friendly, beef stroganoff is the better choice.

Wild Mushroom Steak with Cèpes, Black Trumpets, and Crispy Potatoes

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Prep Time 25

Cooking Time 45

Category Main Dish

Cuisine French-inspired

Portions 3 servings

Calories 850 kcal

Ingredients

For the Steaks
3 thick Angus beef steaks 10 to 14 oz each
1 to 2 tbsp duck fat
Kosher salt to taste
Black pepper to taste
For the Wild Mushroom Sauce
10 oz fresh cèpes or porcini-style mushrooms cleaned and sliced thickly
4 oz fresh black trumpet mushrooms cleaned
2 shallots thinly sliced
2 garlic cloves thinly sliced
3 tbsp cognac
1/2 cup red wine
3/4 to 1 cup reduced veal stock or demi-glace
1 to 1 1/2 tbsp cold butter optional
2 tbsp chopped flat-leaf parsley
Kosher salt to taste
Black pepper to taste
For the Potatoes
1 1/2 to 1 3/4 lb Charlotte potatoes Yukon Gold potatoes, or small waxy potatoes
6 cups water
1 tbsp kosher salt for the blanching water
2 to 3 tbsp duck fat
1 tbsp chopped flat-leaf parsley
Black pepper to taste
Salt to finish

Instructions

Slice the potatoes about 1/8 inch thick. Bring 6 cups water to a boil with 1 tbsp kosher salt, blanch the potatoes for 1 minute, then drain well and let them steam-dry.
Cook the potatoes in duck fat over medium to medium-high heat for 30 to 40 minutes, turning often, until golden and tender. Finish with parsley, pepper, and salt.
Clean and slice the mushrooms, shallots, and garlic. Pat the steaks dry, season with salt and pepper, then sear in a very hot pan with duck fat for about 2 minutes per side. Continue cooking while turning until the steaks reach 120°F to 125°F for rare, 130°F to 135°F for medium-rare, or 140°F to 145°F for medium. Rest for 5 to 8 minutes.
In the same pan, brown the cèpes, then add the black trumpet mushrooms, shallots, and garlic.
Deglaze with cognac and reduce. Add red wine and reduce again.
Add demi-glace and simmer until glossy. Whisk in cold butter off the heat if desired.
Serve the steaks with the wild mushroom sauce and crispy potatoes.

Video

Notes

FAQ