Originating from the French city of Lyon, this classic side dish transforms humble ingredients into a restaurant-quality centrepiece. Lyonnaise potatoes are the perfect marriage of textures and flavours: waxy potato slices pan-fried in butter and olive oil until golden and crisp, tossed together with deeply caramelised, sweet white onions. To elevate this traditional recipe, we finish the pan with a generous pinch of Maldon Garlic Sea Salt flakes, perfectly complementing the sweet onions and rich butter with a burst of savoury, roasted garlic flavour.
Why You’ll Love This Lyonnaise Potatoes Recipe
- The Perfect Texture: Parboiling the potatoes first ensures they are beautifully tender on the inside, while frying them in batches guarantees a golden, crispy exterior.
- Incredible Flavor: Slowly caramelising the onions in the leftover potato cooking oils creates a sweet, savory depth that coats every single bite.
- Elevated Simplicity: It requires only a few basic pantry staples to create an impressive, classic French dish that pairs perfectly with almost any main course.
How to Make Lyonnaise Potatoes (Step-by-Step)
Step 1 – Parboil the potatoes
- Start by slicing the waxy potatoes into 2cm thick slices, discarding the very small, uneven ends.
- Place the slices into a pot of cold water and bring to the boil. Let the potatoes boil for just 2 minutes—you want them to start becoming tender but remain uncooked and firm in the middle. This crucial step ensures they won’t break down and turn to mash when sautéed later.
Step 2 – Dry and fry in batches
- Drain the potatoes well and allow them to sit for a few minutes to ensure they are fully dry. In a large frying pan, add half of the butter and olive oil.
- Once hot, begin frying the potato slices in batches to ensure they all get nice and golden crisp on each side.
- Remove the slices from the pan as they finish cooking.
Step 3 – Caramelise the onions
- Once all the potato slices are fried and set aside, add the remaining butter and olive oil to the pan.
- Toss in the finely sliced white onions along with the Maldon Garlic Sea Salt flakes. Fry over medium heat for about 8 minutes until the onions are soft, golden, and beautifully caramelised.
Step 4 – Combine and serve
- Finally, add the golden potatoes back to the pan with the onions to warm them through. Season with cracked black pepper.
- Transfer the Lyonnaise potatoes to a serving dish and garnish with an extra sprinkle of Maldon Garlic Sea Salt flakes and the freshly chopped parsley.
Tips for the Perfect Potatoes a la Lyonnaise
- Use Waxy Potatoes: It is vital to use waxy potatoes (like new potatoes, Charlotte, or Yukon Gold) rather than floury baking potatoes. Waxy potatoes hold their shape when boiled and fried; floury ones will disintegrate in the pan.
- Dry Thoroughly: Moisture is the enemy of a crispy crust. After draining your parboiled potatoes, let them steam dry completely before they hit the hot fat.
- Don’t Rush the Onions: The magic of a true recipe for potatoes Lyonnaise comes from the sweet, jammy onions. Take your time during the 8-minute frying stage to ensure they caramelise properly without burning.
What to Serve with Lyonnaise Potatoes
Garlic and Tarragon Chicken
This rich, buttery side dish is incredibly robust and pairs beautifully with classic, protein-heavy mains. It is the ultimate side dish for a perfectly seared steak, a roasted rack of lamb, or crispy-skinned roast chicken.
Frequently Asked Questions
What are Lyonnaise potatoes?
Lyonnaise potatoes (or pommes de terre à la lyonnaise) is a traditional French dish originating from the city of Lyon. It consists of sliced, pan-fried potatoes mixed with thinly sliced, butter-caramelised onions, typically finished with fresh parsley.
Do I have to peel the potatoes first?
This comes down to personal preference. Traditionally, the potatoes are peeled. However, if you are using thin-skinned new potatoes, you can absolutely leave the skins on for extra texture and rusticity.
Can I make Lyonnaise potatoes ahead of time?
While they are best served fresh and crispy straight from the frying pan, you can do the prep work ahead of time. You can parboil the potatoes and slice the onions hours in advance, leaving only the frying and caramelising for right before dinner.
