Swiss rösti is a skillet cake of grated potatoes, crisp and golden outside with a tender center. This version uses the parboiled potatoes common in Bernese-style rösti; Swiss cooks and regions have their own variations, from simple salted potatoes to versions with onion or cheese.
Ingredients
- 2 lb (900 g) medium waxy potatoes, such as Yukon Gold, about 6 cups once grated
- 8 cups (1.9 L) cold water, or enough to cover the potatoes by about 1 inch (2.5 cm)
- 1 tsp (6 g) fine salt, divided
- 3 tbsp (42 g) unsalted butter, divided
- 1 tbsp (15 ml) neutral oil, such as canola or sunflower oil
- ¼ tsp (0.5 g) black pepper, optional
Waxy potatoes hold their shape well when grated, making it easier to turn the cake without it breaking apart. If Yukon Gold potatoes are unavailable, use another yellow or waxy variety. Russets can work, but they are drier and more likely to crumble, so handle the grated potatoes gently. A 10-inch (25 cm) heavy skillet is ideal; a well-seasoned cast-iron pan or a good nonstick skillet both work.
Instructions
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Parboil the potatoes. Scrub the potatoes and place them whole, with their skins on, in a large saucepan. Add the cold water, cover the pan, and bring it to a boil over high heat. Reduce the heat to maintain a steady simmer and cook for about 18 minutes. The potatoes should be partly cooked: a thin knife should enter the outside easily but meet resistance near the center. Smaller potatoes may be ready sooner, so start checking at 15 minutes. Drain them well.
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Cool and chill. Leave the drained potatoes uncovered for about 5 minutes so excess steam can escape. Transfer them to a plate or shallow container and refrigerate for at least 1 hour, until cold and firm. Chill them within 2 hours of cooking. This step is important: warm potatoes are soft and sticky, while cold parboiled potatoes grate cleanly and are easier to shape. You can do this a day ahead.
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Grate and season. Peel the cold potatoes with a small knife or your fingers, then grate them through the large holes of a box grater into a wide bowl. Work gently so the shreds stay distinct rather than turning into a mash. Sprinkle with ¾ teaspoon of the salt and the pepper, if using, and toss lightly with your fingertips. Keep the remaining ¼ teaspoon salt nearby to adjust after cooking.
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Heat the skillet. Set a 10-inch skillet over medium heat. Add 2 tablespoons (28 g) of the butter and the oil. When the butter has melted and looks foamy, tilt the pan so the fat coats the bottom. The oil helps keep the butter from browning too quickly, while butter gives the potatoes their characteristic savory flavor.
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Build the rösti. Add the grated potatoes, spreading them into an even layer. Use a spatula to nudge them into a round cake about ¾ inch (2 cm) thick; do not press so hard that the shreds become compacted. Cook for 2 minutes, then lower the heat to medium-low. Continue cooking for about 13 minutes, occasionally shaking the pan gently. The underside should become deep golden and crisp, and the top should look less wet. If the bottom is browning too fast, reduce the heat.
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Flip and finish cooking. Loosen the edge with a thin spatula. Place a large flat plate over the skillet, hold it firmly with an oven mitt, and carefully invert the pan so the rösti lands on the plate. Add the remaining 1 tablespoon (14 g) butter to the skillet, then slide the rösti back in, uncooked side down. Cook over medium-low heat for about 12 minutes, until the second side is browned and the center is hot. If it needs a little more color, give it another minute or two rather than raising the heat sharply. Taste a small piece and add the remaining salt if needed.
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Rest and serve. Slide the rösti onto a cutting board and leave it for 2 minutes so the surface settles and the wedges cut neatly. Slice into four portions and serve hot, while the edges are still crisp.
Tips
- Keep the potatoes partly cooked. Fully tender potatoes can grate into a sticky mass and may make the cake dense. Check early; the center should still offer a little resistance when the potatoes come off the heat.
- Choose the right grater and touch. Large grater holes make distinct strands, and a light toss with salt keeps them from breaking down. Avoid kneading or compressing the mixture before it goes into the pan.
- Control the heat instead of rushing. Rösti needs time for the center to heat and the crust to develop. If butter smells sharply toasted or the underside darkens before the top begins to dry, turn the burner down. A heavy pan also helps distribute heat evenly.
- Use a plate for the flip. A plate wider than the skillet gives the cake support. Keep your face and hands clear of escaping steam, use a dry oven mitt, and flip over a counter rather than a burner. If the cake cracks slightly, press it back together in the pan; it will still taste good.
Serving Suggestions
Serve rösti as a substantial side with roast chicken, sausages, or a simple green salad. For a Swiss-inspired plate, pair it with sliced cold meat and pickles, or serve it beside a creamy mushroom dish. It is also satisfying on its own with a spoonful of sour cream or crème fraîche and chopped chives, though that topping is an addition rather than part of the basic potato preparation.
For a brunch-style meal, top each hot portion with a fried egg, or put a bowl of applesauce on the table for a sweet-and-savory contrast. If serving rösti with other rich foods such as cheese or sausage, balance the plate with something crisp and acidic: dressed greens, cornichons, or a lightly dressed cabbage salad. Cut the cake into wedges just before serving so each person gets some of the browned edge.
Variations
Swiss rösti varies by region and household, so the plain potato version is a starting point rather than a single definitive formula. For onion rösti, finely grate or mince ½ small onion (about 35 g) and cook it slowly in a teaspoon of the measured butter until soft; cool it, then toss it with the grated potatoes. Raw onion can stay sharp and release moisture, so soften it first.
For a richer version, scatter ½ cup (50 g) finely grated Gruyère over the potatoes during the last few minutes of cooking, then cover the pan briefly so the cheese melts. This makes the cake more savory and less crisp where the cheese touches the skillet. You can also add 2 tablespoons (30 g) chopped parsley or chives after grating. If you want a crispier, looser cake, cook the potato in two smaller rounds rather than making one thick rösti; use half the butter and oil for each batch and watch the timing, since thinner cakes brown faster.
Some cooks grate raw potatoes instead of parboiling them. That is a different, quicker method: raw shreds release more starch and moisture, so they need to be squeezed very dry and cooked through more carefully. The parboiled approach here is convenient for a tender middle and is particularly practical when the potatoes are prepared the day before.
Storage and Reheating
Rösti is at its crispest straight from the skillet. Refrigerate leftovers within 2 hours of cooking in a covered container, and keep them for 3 to 4 days. If storing a whole cake, let it cool enough to handle, then refrigerate it promptly; do not leave cooked potatoes at room temperature for an extended period. For the best texture, store wedges in a single layer or separate layers with parchment.
To reheat, place wedges in a lightly buttered skillet over medium-low heat for about 4 to 6 minutes per side, turning once, until crisp and heated through. A toaster oven or regular oven set to 375°F (190°C) also works; heat the wedges on a baking sheet for about 10 to 15 minutes, turning once if needed. Reheat leftovers to 165°F (74°C), as recommended by USDA FSIS, checking the thickest part with a food thermometer. The microwave is quick but softens the crust, so use it only if crispness is not a priority. Freeze cooled portions in an airtight freezer-safe container for up to 2 months; thaw in the refrigerator before reheating, or reheat from frozen for longer until hot throughout.
Frequently Asked Questions
Why are the potatoes cooked before grating?
Parboiling starts the cooking but leaves the centers firm enough to grate. Chilling then firms the potatoes further, so the shreds stay separate and the cake is easier to turn. It also lets you prepare the potatoes ahead, making the final skillet cooking more manageable.
Can I make rösti without chilling the potatoes?
It is possible, but it is harder to grate and shape warm potatoes without crushing them. For this method, give the cooked potatoes at least an hour in the refrigerator. If you are short on time, spread them in a shallow layer and chill until cold and firm, checking that they are still refrigerated safely rather than leaving them on the counter for a long stretch.
How do I know when the rösti is ready to flip?
After the initial two minutes, cook it gently until the top looks drier and the edge is firm. Slide a thin spatula under one edge to check for an even golden-brown crust. If the potato layer is still pale or sticks when you try to loosen it, give it a few more minutes at medium-low heat.
What can I use instead of butter?
Use 3 tablespoons (45 ml) of neutral oil in place of the butter, divided across the two sides. The rösti will still brown, but it will lack butter’s rounded, nutty flavor. A plant-based butter can also work; check its label because products vary in water content and may brown differently.
Can I prepare rösti ahead for guests?
Yes. Parboil and chill the potatoes up to a day ahead, then peel, grate, and fry the rösti shortly before serving. You can also cook the cake completely and re-crisp it in a skillet or oven, but the crust is best when freshly cooked. If holding it briefly, keep it warm in a low oven and serve as soon as possible so steam does not soften the underside.
Related
- Swiss Steak Crock Pot Recipe with Rich Brown Gravy
- Swiss Steak Without Tomatoes: A Savory, Slow-Braised Dinner
- Swiss Rösti Recipe: Make a Classic Crispy Potato Cake
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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