Steak Mock Frites
Updated Nov. 7, 2022

- Total Time
- 1 hour
- Rating
- Comments
- Read comments
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Ingredients
- Kosher salt
- 8-12 new, baby or C-grade potatoes
- 3tablespoons neutral oil, like canola
- 6tablespoons unsalted butter
- 2teaspoons thyme leaves, minced
- 1small shallot, peeled and minced
- 1teaspoon freshly squeezed lemon juice
- Splash Champagne or white-wine vinegar
- 2pounds beef steak, like boneless rib-eye, approximately 1 inch thick
- Kosher salt and freshly ground black pepper
- 1tablespoon neutral oil, like canola.
For the Mock Frites
For the Maître D’hôtel Butter
For the Steak
Preparation
- Step 1
Preheat oven to 450. Set a large pot filled with salted water on the stove. Add potatoes, turn heat to high and cook, gently boiling, until they are softened, approximately 15 minutes. Drain potatoes, and dry them well.
- Step 2
Grease a sheet pan with half the oil, and put the potatoes on the pan. Using a potato masher or the bottom of a heavy glass, gently smash each potato, pressing it down to a thickness of less than an inch. Drizzle the rest of the oil over the smashed potatoes, place on top rack in the oven and allow to roast until the exteriors are golden and crunchy, approximately 20 to 25 minutes. Add salt to taste.
- Step 3
Make the maître d’hôtel butter. Put the butter on a cutting board and, using a fork, cut the other ingredients into it until the butter is creamy and smooth. Scrape the butter together with a chef’s knife, and form it into a rough log. If making it ahead of time, you can roll it tight in a sheet of plastic wrap and refrigerate until ready to use.
- Step 4
As the potatoes finish crisping, make the steaks. Set a heavy-bottomed skillet — or 2 if your steaks are large and you are cooking them in 4 pieces — over high heat, and let it sit for a few minutes. Shower the steaks with an aggressive amount of salt and pepper. Add the oil to the pan, and shake to distribute. It will almost immediately begin to smoke. Place the steaks in the pan, and allow to sear, unattended, for 4 minutes, until they have developed a serious crust. Turn the steaks over, and cook for an additional 3 to 6 minutes for medium-rare. Remove steaks to a warm platter to rest. Top each steak with a tablespoon of the butter.
- Step 5
Remove the potatoes from the oven, and season them with salt and a grind of pepper. Place 2 or 3 crunchy potatoes on each plate, then nestle a steak up beside them. Top each steak with pats of the remaining butter.
Private Notes
Comments
Steam the baby potatoes instead of boiling them. Less chance of them splitting and getting water logged, and it eliminates the need to dry the potatoes. Plus, you can steam them and flatten them ahead of time, and crisp them later. I prefer to do the crimping in olive oil and some fresh rosemary (with a nice crunchy Maldon salt) but up to you.
Made the potatoes on a preheated cast iron skillet and they came out great. Instead of putting extra oil on top, I turned them over when the bottoms were brown. Total time took about 30 minutes. They were wonderfully crispy and looked just as they do in the photo.
'Mock Frites' is a really cute name, but let's just call them 'smashed potatoes!' And, to make them really tasty, add some butter to the oil, a little balsamic vinegar and some garlic and herbs!
Used this recipe for the smashed potatoes and they were delicious! Followed another person’s suggestion to leave potatoes in the hot oven another 15 minutes or so after turning the oven off. They developed a crunchy crispiness that was perfect!
In my house, these mock frites are called "smashers" and are in near-constant rotation. No steak required, but it is a nice pairing.
Made exactly as the recipe said, except my steaks were beef tenderloin, about 1 1/2 inch thick each. I resisted the urge to tweak (butter on the potatoes? Olive oil instead of neutral oil?) and everyone raved about the results. Winner!
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