Swiss Rösti – the original recipe is always a winner!
The perfect accompaniment to any dish, and with potatoes as the base, anything is possible! When making Rösti, it is essential to use the right type of potato and, crucially, to grate the potatoes correctly. It may sound funny, but it makes all the difference.
Swiss Rösti is much more than just a potato side dish. It is a symbol of Swiss cuisine and its rural roots. Originally conceived as a breakfast for farmers, Rösti has evolved over time into a versatile dish that can be both rustic and refined.
The basic ingredients
The basic ingredients are simple: potatoes, salt and a little fat. But the real magic lies in the preparation. From choosing the right type of potato to the perfect amount of heat and oil, every detail influences the end result. Traditionally, Rösti is fried in a pan until it is golden brown and crispy. But today there are numerous variations, from the addition of onions and bacon to cheese.
It goes perfectly with Zürcher Geschnetzeltes, which is now one of Switzerland’s national dishes. You can find the recipe here.
Which potatoes?
For Rösti you need floury potatoes. In Switzerland, Agria works particularly well – it was even named Potato of the Year in 2022. Boil the potatoes the day before for about 10 minutes only, so they are still firm in the middle. Let them cool completely, then chill them for at least 12 hours. This is what develops the resistant starch that later holds the Rösti together. When you grate them, they should feel firm and slightly waxy.
Ingredients for Swiss Rösti
- Floury potatoes – varieties such as Agria bind particularly well once grated
- Salt – about 1½ tsp; I like to use fleur de sel for a savoury base note
- Clarified butter – Swiss Bratbutter, which takes high heat without burning
- Butter – added at the end for the buttery finish
How to Make Swiss Rösti – Step by Step
Prepare the potatoes: Boil the potatoes unpeeled the day before for about 10 minutes only – they should still offer clear resistance in the middle. Drain, cool completely and chill for at least 12 hours. This is the single most important step: without it, the grated potato will not bind.
Grate and season: Peel the cold potatoes and grate them on a coarse grater, holding each potato lengthways so the strands come out long. Longer strands bind better. Season with salt – about 1½ teaspoons for 1 kg of potatoes.
Start frying: Melt half the clarified butter in a pan over medium heat, then turn it up to the highest setting. The pan needs to be properly hot before the potatoes go in, otherwise the Rösti will stick and soak up fat. Add the grated potatoes and shape them into a compact cake.
Build the crust: Fry over high heat for about 3 minutes, then reduce the heat and continue frying gently for about 15 minutes. When you shake the pan and it sounds crisp – almost like a whistle – the crust has formed.
Flip and finish: Turn the Rösti out onto a plate and slide it back into the pan. Dot the remaining butter in small pieces around the edge and fry for another 10 minutes, until it sounds crisp again.
Serve: Slide the finished Rösti out of the pan and serve immediately while hot.
Tips & Variations
The pan matters more than people expect. A well-seasoned cast iron pan or a good non-stick pan around 24 cm gives the most even crust. Whatever you use, let it get properly hot before the potatoes go in – a lukewarm pan is the main reason Rösti sticks and turns greasy instead of crisp.
Resist the urge to press the Rösti down or move it around. Once you have shaped the cake, leave it alone. Every time you lift an edge to check, you break the crust that is forming underneath. Trust your ears instead: when the pan sounds crisp as you shake it, the base is ready.
For a heartier version, work diced bacon, finely sliced onions or grated cheese into the grated potatoes before frying. Appenzeller or Gruyère both work beautifully. A classic Rösti mit Spiegelei – topped with a fried egg and a scattering of chives – turns the side dish into a full meal.
If you are cooking for a crowd, make several small Rösti rather than one large one. They are far easier to flip, and everyone gets a share of the crust.
Storage
Room temperature: Serve straight from the pan. Rösti loses its crust within about fifteen minutes as steam softens it from underneath.
Fridge: Leftovers keep for 2 days in an airtight container. To reheat, fry slices in a pan with a little butter over medium heat until crisp on both sides. Avoid the microwave – it turns the crust soft and the inside gluey.
Freezer: Cooked Rösti freezes reasonably well for up to 2 months. Cool completely, wrap portions individually and reheat from frozen in a pan or at 200 °C / 390 °F in the oven for 12–15 minutes.
Getting ahead: The boiling and chilling can be done up to two days in advance – in fact, longer chilling only improves the binding. Keep the cooked potatoes unpeeled in the fridge and grate them just before frying.
Frequently asked questions
Almost always the potatoes were boiled for too long. They should cook for around 10 minutes only and stay firm in the middle. After that they need at least 12 hours in the fridge – that is when the resistant starch forms that holds the strands together. If the potatoes feel firm and slightly waxy when you grate them, you are on the right track.
Yes, it is possible, but classic Swiss Rösti is made with pre-cooked potatoes, as this gives it a better consistency and crispiness.
For a hearty version, you can mix diced bacon, onions or grated cheese into the grated potatoes.
Rösti is excellent as a side dish with meat dishes or can be served as a main course with a fried egg and some chives.
A coated or well-seasoned cast iron pan helps to get the Rösti perfectly crispy.
Many Swiss cooks do, and it works – waxy potatoes hold their shape and are more forgiving. Floury varieties like Agria give a fluffier interior and bind more strongly, which is why this recipe uses them.
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Recipe Card
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Swiss Rösti – The Original Recipe
Equipment
- 1 cast iron or non-stick pan, 24 cm
- 1 coarse grater
- 1 large plate for flipping
Ingredients
- 1 kg floury potatoes e.g. Agria
- 1,5 tsp salt ideally fleur de sel
- 100 g clarified butter Swiss Bratbutter
- 1 tbsp butter
Instructions
- Boil the potatoes unpeeled the day before for about 10 minutes only – they should still offer clear resistance in the middle. Drain, cool completely and chill for at least 12 hours. This is what makes them firm and slightly waxy, and it is crucial for the Rösti to bind.
- Peel the cold potatoes. Grate them slowly on a coarse grater, holding each potato lengthways. This is important: it makes the strands longer, so the starch binds better during frying – a tip from Swiss chef Stef Wieser. Season with the salt.
- Melt 50 g of the clarified butter in the pan over medium heat, then turn it up to the highest setting. The pan must be properly hot before the potatoes go in, otherwise the Rösti will stick and soak up fat. Add the grated potatoes and shape them into a compact cake.
- Fry over high heat for 3 minutes, then reduce to low and fry slowly for about 15 minutes. Do not press down or move the Rösti. It should sound crisp, almost like a whistle, when you shake the pan.
- Turn the Rösti out onto a plate and slide it back into the pan. Dot the remaining clarified butter and the tablespoon of butter in small pieces around the edge and fry for another 10 minutes, until it sounds crisp again.
- Slide the finished Rösti out of the pan and serve immediately while hot.
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