Pan-Seared Steak with Creamy Three-Cheese Sauce and Potato Gratin
This pan-seared steak is served with a velvety sauce made from Comté, Beaufort, and Abondance, plus individual baby potato gratins scented with fresh basil. The recipe is based on my original YouTube video, with adjusted cheese quantities, a shorter potato cooking time, and a safer alcohol-free pan sauce. The key is gentle heat: the cheese should melt smoothly into the cream without boiling or turning oily.
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A three-cheese steak sauce is a cream-based pan sauce enriched with firm Alpine-style cheeses. It is richer than a standard peppercorn sauce, so I serve it with simply seasoned beef and use the same cheeses sparingly in the potato gratins. This is a substantial bistro-style dinner for weekends, celebrations, or any cold evening when a light supper is not the plan.
What Makes This Recipe Different
This is not simply a steak covered with melted cheese. The sauce starts with the browned residue left by the beef, which gives the cream a deeper roasted flavour. The cheeses are then added gradually over low heat so they melt into a smooth sauce instead of collecting in a rubbery ball.
I make it this way because Comté, Beaufort, and Abondance each bring something different. Comté is nutty, Beaufort is buttery and savoury, and Abondance has a slightly fruity flavour. You can read my guide to making a creamy pan sauce if you want a closer look at the basic technique.
The original video used considerably more cheese and included a flambé. This updated version keeps the character of the dish while using a more balanced amount of cheese and an alcohol-free reduction. It is also different from my steak with tarragon cream sauce, which is more herbal, and my rib steak with mustard sauce, which has a sharper Dijon flavour.
Ingredients You Need
For the beef, use three well-marbled steaks weighing about 10 ounces each. Rib-eye, strip loin, top sirloin, or another tender grilling steak will work. An aged steak has a particularly concentrated beef flavour, as shown in my dry-aged steak recipe, but regular steaks are completely suitable.
The potato gratins use small red, yellow, and blue potatoes. Their colours make the plates more interesting, but the varieties cook in essentially the same way. Slice them about 1/8 inch thick. If the slices are paper-thin, they may disintegrate during precooking.
The cheese mixture contains equal amounts of Comté, Beaufort, and Abondance. The exact varieties can be adjusted depending on what is available in Canada or the United States, but the cheeses should melt well and have a firm, nutty character. Unlike the original 16-ounce mixture, this version uses 9 ounces in total. Five ounces go into the gratins and four ounces into the sauce.
Low-sodium beef broth and a spoonful of verjus or unsweetened apple juice form the reduction. The small amount of acidity is important because the plate contains steak, cream, cheese, and potatoes. Without it, the sauce can taste flat and excessively rich.
Step-by-Step Instructions
1. Prepare the cheese and potatoes
Finely grate the three cheeses, combine them in a bowl, and divide the mixture into two portions. Reserve 5 ounces for the potato gratins and 4 ounces for the sauce. Finely grated cheese melts more evenly than thick shreds.
Wash the baby potatoes and slice them into rounds approximately 1/8 inch thick. Try to keep the slices uniform. A mandoline works well, but use its hand guard and stop before the potato becomes too small to hold safely.
2. Briefly precook the potatoes
Put the sliced potatoes in a saucepan, cover them with cold water, and add the salt intended for the cooking water. Bring them to a gentle boil and cook for 5 to 7 minutes.
The 15-minute cooking time shown in the original video is too long for thin slices. What I look for here is a potato that bends slightly but does not break when lifted. The centre should still have a little resistance.
Drain the potatoes carefully and leave them in the colander for about 5 minutes. The escaping steam removes surface moisture that could otherwise make the gratins watery.
3. Assemble and bake the individual gratins
Heat the oven to 425°F. Butter three small gratin dishes and scatter a few basil leaves across the bottom. Divide the potato slices among the dishes without packing them too tightly.
Pour about 3 tablespoons of cream into each dish. The cream should come no more than halfway up the potatoes. Season lightly with pepper, then divide the reserved 5 ounces of cheese over the tops.
Bake for 12 to 15 minutes. The cream should bubble gently around the sides, the potatoes should be tender, and the cheese should be lightly golden. Keep the gratins warm while cooking the steaks. For another version of this type of side dish, see my Savoyard potato gratin or the more traditional French gratin dauphinois.
4. Sear the steaks
Pat the steaks dry. A dry surface browns much more efficiently than a damp one. Season them lightly with salt and black pepper.
Heat a heavy skillet over medium-high to high heat. Add the oil, then place the steaks in the pan when the oil begins to shimmer. You should hear a firm sizzle immediately. If the pan is quiet, it is not hot enough.
Cook the steaks for about 2 minutes before turning them. Continue cooking, turning every minute, until they reach your preferred doneness. Timing will vary with thickness, so a thermometer is more reliable than the clock. For food safety, whole beef steaks should reach 145°F followed by a 3-minute rest.
Transfer the steaks to a warm plate and let them rest while preparing the sauce. Do not wash the skillet. The dark brown residue on its surface is the foundation of the sauce.
5. Build the pan reduction
Lower the heat to medium. If the skillet contains a large amount of rendered fat, carefully remove most of it while leaving the browned bits behind.
Add the sliced shallots and cook for 1 to 2 minutes. They should soften and smell sweet without becoming dark or crisp. Pour in the beef broth and verjus or apple juice, then scrape the skillet with a wooden spoon.
Let the liquid simmer until reduced by approximately half. It should look slightly syrupy and leave a thin coating on the spoon. This concentrates the beef flavour and prevents the finished sauce from becoming watery.
6. Finish the cheese sauce gently
Reduce the heat to low and add the remaining cream. Warm it until steam rises from the surface, but do not let it boil.
Toss the reserved 4 ounces of grated cheese with the cornstarch, if using. Add the cheese to the skillet in three or four small additions, stirring constantly and allowing each portion to melt before adding more.
The mistake to avoid is turning up the heat to make the cheese melt faster. High heat can make the proteins tighten and force out the fat. If the sauce becomes too thick, stir in a tablespoon of warm broth. If it remains thin, let it stand over low heat for a minute rather than adding a large amount of extra cheese. My guide to thickening sauces correctly explains several other options.
The sauce is ready when it flows slowly from the spoon in a smooth ribbon. Taste before adding any salt because the cheeses contribute plenty of seasoning.
7. Plate the dinner
Place one steak on each warm plate and spoon the sauce over part of the meat, leaving some of the browned surface visible. Add one potato gratin and finish with fresh basil.
Serve immediately while the sauce is fluid and the gratin is hot. Once a cheese sauce cools, it naturally becomes thicker.
What to Serve With the Steak
The potato gratin already makes this a complete and filling plate, so a crisp vegetable or acidic salad is the best additional side. A romaine and endive green salad brings the bitterness and freshness that the cheese sauce needs.
For a more elaborate French dinner, the steak also works with classic pommes duchesse or delicate mushroom-shaped potatoes. Do not serve those in addition to the gratin unless you are replacing it.
For more beef dinners, try the colourful pepper steak with bell peppers, a wild mushroom steak with porcini, or my quick garlic butter steak bites. The complete collection of bistro-style steak recipes offers more options for pan cooking, oven finishing, and grilling.
Storage and Reheating
Refrigerate leftover steak, sauce, and potatoes in separate covered containers for up to three days. Separating them makes reheating much easier.
Warm the sauce slowly in a small saucepan over low heat, adding a spoonful of broth or cream to loosen it. Do not microwave it at full power because the cheese may separate. Reheat the potatoes in a 350°F oven until hot.
For the best texture, warm sliced steak briefly in a covered skillet over low heat. Prolonged reheating will continue cooking the centre.
Substitutions
If Beaufort or Abondance is difficult to find, use Gruyère, Emmental, aged Swiss, or a mild firm Canadian cheese. Keep at least one strongly flavoured cheese in the mixture so the sauce does not taste like plain cream.
Rib-eye can be replaced with strip loin, top sirloin, beef tenderloin, or hanger steak. Leaner cuts need a little more oil and should be watched closely because they cook quickly.
Small Yukon Gold potatoes can replace the multicoloured baby potatoes. Regular russet potatoes are less suitable because thin precooked slices can become fragile and floury.
Half-and-half can replace 15% cooking cream, although the sauce may be slightly thinner. Heavy cream also works, but it produces a richer result and may need a spoonful of broth to loosen it. Fresh parsley or chives can replace the basil.
FAQ
Why did my cheese sauce become oily?
The heat was probably too high, or the cheese was added too quickly. Remove the skillet from the heat and whisk in a small spoonful of warm cream. It may not return to a completely perfect emulsion, but it should become smoother.
Can I prepare the potato gratins in advance?
Yes. Assemble and bake them earlier in the day, cool them, and refrigerate them covered. Reheat at 350°F until the centres are hot. Add the fresh basil only at serving time.
Can I use only one kind of cheese?
Yes. Comté or Gruyère would be the best single-cheese choices. Using all three creates a more complex flavour, but it is not required for the sauce to work.
Why are the potatoes only boiled for 5 to 7 minutes?
They are already sliced thinly and will continue cooking in the oven. Boiling them for 15 minutes can make them break apart and release too much starch into the gratin.
Can I make the sauce without cornstarch?
Yes. Cornstarch is optional. It makes the emulsion more forgiving, especially with aged cheeses, but gentle heat and gradual mixing are usually enough.
How do I keep the steaks warm while making the sauce?
Place them on a warm plate and cover them loosely. Do not wrap them tightly, since trapped steam will soften the browned crust. The short resting period also allows the juices to settle before serving.
Pan-Seared Steak with Creamy Three-Cheese Sauce and Potato Gratin
Ingredients
- 3 well-marbled beef steaks about 10 ounces each
- 1 3/4 pounds multicoloured baby potatoes
- 3 ounces Comté cheese finely grated
- 3 ounces Beaufort cheese finely grated
- 3 ounces Abondance cheese finely grated
- 1 1/2 cups 15% cooking cream divided
- 2 small shallots thinly sliced
- 2/3 cup low-sodium beef broth
- 1 tablespoon verjus or unsweetened apple juice
- 1 tablespoon unsalted butter
- 1 tablespoon neutral cooking oil
- 12 to 15 fresh basil leaves plus more for serving
- 1 teaspoon cornstarch optional
- 1 teaspoon kosher salt for the steaks
- 2 teaspoons kosher salt for the potato water
- 1 teaspoon freshly ground black pepper divided
Instructions
- Heat the oven to 425°F. Combine the three grated cheeses and reserve 5 ounces for the gratins and 4 ounces for the sauce.
- Slice the potatoes 1/8 inch thick. Cover with cold water, add 2 teaspoons salt, bring to a gentle boil, and cook for 5 to 7 minutes.
- Drain the potatoes and let them steam-dry for 5 minutes.
- Butter three small gratin dishes. Add basil, potatoes, 3 tablespoons cream per dish, pepper, and the 5 ounces of reserved cheese.
- Bake the gratins for 12 to 15 minutes, until tender and lightly golden. Keep warm.
- Pat the steaks dry and season with 1 teaspoon salt and some pepper. Heat the oil in a heavy skillet over medium-high heat.
- Sear the steaks for 2 minutes, turn, and continue cooking to the desired doneness. Transfer to a warm plate and rest for at least 3 minutes.
- Lower the heat to medium. Cook the shallots in the skillet for 1 to 2 minutes.
- Add the broth and verjus or apple juice. Scrape up the browned residue and reduce the liquid by half.
- Lower the heat and add the remaining cream. Toss the remaining cheese with cornstarch, if using, and incorporate it gradually without boiling.
- Stir until the sauce is smooth and velvety. Adjust with a spoonful of broth if it is too thick.
- Serve each steak with cheese sauce, one potato gratin, and fresh basil.
