Lyonnaise Potatoes

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Golden, buttery, and irresistibly crisp, Lyonnaise Potatoes are a timeless French side dish that blends simplicity with elegance. With layers of thinly sliced potatoes and caramelized onions, this dish boasts a rich flavor profile that comes from just a few humble ingredients treated with care. Finished with a sprinkle of fresh parsley, it offers both comfort and sophistication on the same plate.

Whether you’re planning a hearty dinner or a special brunch, Lyonnaise Potatoes are a versatile choice that pairs beautifully with roasted meats, eggs, or even a fresh salad. The beauty of this dish lies in the contrast—the tender inside of each potato slice meets a lightly crisped outside, complemented by sweet, golden onions that elevate every bite.

Why You’ll Love This Lyonnaise Potatoes Recipe

This recipe is a celebration of simplicity and flavor. It requires no fancy ingredients or complicated steps, yet delivers an incredibly satisfying result. It’s budget-friendly, naturally gluten-free, and perfect for everything from casual meals to holiday dinners. Plus, it’s a great make-ahead option that reheats beautifully.

Preparation Phase & Tools to Use (Essential Tools and Equipment, Plus Why They Matter)

To prepare Lyonnaise Potatoes efficiently and with the best results, here are the tools you’ll want on hand:

• Mandoline Slicer or Sharp Knife – Ensures uniform thin slices for even cooking.
• Heavy-Bottomed Skillet (Cast Iron or Stainless Steel) – Distributes heat evenly and helps in achieving that perfect golden-brown crust.
• Wooden Spoon or Silicone Spatula – Gently stirs the onions and potatoes without breaking them.
• Mixing Bowl – Useful for tossing potato slices with salt or herbs before cooking.
• Paper Towels – Helps remove excess moisture from potatoes to enhance crisping.

Each of these tools contributes to a smoother prep process and better texture, especially when crispness and even cooking are key.

Preparation Tips

Use waxy potatoes like Yukon Golds for their creamy texture and ability to hold their shape. Slice them as uniformly as possible to avoid under- or over-cooked pieces. Always pat the slices dry before frying to reduce splattering and help them crisp up. When caramelizing onions, keep the heat on medium-low and be patient—rushing this step can lead to uneven flavor. Cook the potatoes in batches if needed; overcrowding the pan will cause steaming instead of browning. Finish the dish with fresh parsley for a pop of color and a fresh contrast to the rich flavors.

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Ingredients for this Lyonnaise Potatoes Recipe

• 2 pounds Yukon Gold potatoes (or other waxy potatoes)
• 2 large yellow onions, thinly sliced
• 2 tablespoons unsalted butter
• 2 tablespoons olive oil
• Salt, to taste
• Freshly ground black pepper, to taste
• 1 tablespoon chopped fresh parsley (optional, for garnish)

Optional:

• 1 garlic clove, minced (for extra flavor)
• 1 teaspoon fresh thyme or 1/2 teaspoon dried thyme

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Step 1: Prepare the Potatoes

Wash and peel the potatoes if desired (leaving the skin on is fine, too). Slice them into thin, uniform rounds about 1/8 inch thick. Use a mandoline slicer for best results. Place slices on a clean kitchen towel or paper towels to remove any surface moisture.

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Step 2: Caramelize the Onions

In a large heavy-bottomed skillet or cast iron pan, heat 1 tablespoon of butter and 1 tablespoon of olive oil over medium-low heat. Add the sliced onions with a pinch of salt. Stir occasionally, cooking them for about 15–20 minutes until they become soft, golden, and lightly caramelized. Once done, transfer to a plate and set aside.

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Step 3: Cook the Potatoes

In the same skillet, add the remaining butter and oil. Increase heat to medium. Layer the potato slices in batches, avoiding overcrowding. Let them cook for 3–5 minutes per side, turning carefully, until golden brown and tender. Season with salt and pepper as they cook.

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Step 4: Combine and Finish

Once all potatoes are cooked, return the caramelized onions to the pan and toss gently with the potatoes. Let them heat together for 2–3 minutes, allowing flavors to meld. Adjust seasoning if needed.

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Step 5: Garnish and Serve

Transfer to a serving dish and sprinkle freshly chopped parsley on top for a fresh finish. Serve immediately while hot and crisp. These are perfect alongside roast meats, eggs, or as a stand-alone comfort dish.

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Notes

Lyonnaise Potatoes are best enjoyed fresh, but they also hold up well for reheating, making them ideal for meal prep or gatherings. The balance of buttery potatoes and sweet caramelized onions creates a versatile flavor profile that fits breakfast, lunch, or dinner. You can tweak the seasoning with garlic, herbs like thyme or rosemary, or even a splash of white wine for extra depth.

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Watch Out for These Mistakes While Cooking

• Skipping the drying step: Excess moisture on the potato slices can prevent browning and lead to soggy results.
• Overcrowding the skillet: This traps steam and causes the potatoes to steam instead of crisp.
• Using the wrong potatoes: Starchy potatoes like Russets can fall apart. Stick to waxy varieties.
• Rushing the onions: Caramelizing onions takes time. Don’t rush or turn up the heat too high.
• Underseasoning: Potatoes need a good amount of salt to bring out their flavor. Season in layers.

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Storage Instructions

Store leftover Lyonnaise Potatoes in an airtight container in the refrigerator for up to 4 days. To reheat, use a skillet over medium heat for the best texture. You can also reheat in the oven at 375°F (190°C) for about 10–15 minutes. Avoid microwaving if possible, as it may soften the crisp edges.

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Estimated Nutrition

Serving Size: 1 cup (approximately)

• Calories: 210
• Total Fat: 10g
• Saturated Fat: 3g
• Unsaturated Fat: 6g
• Trans Fat: 0g
• Cholesterol: 10mg
• Sodium: 180mg
• Total Carbohydrates: 28g
• Fiber: 3g
• Sugar: 3g
• Protein: 3g

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Frequently Asked Questions

What kind of potatoes are best for Lyonnaise Potatoes?

Waxy potatoes like Yukon Gold or red potatoes work best because they hold their shape during cooking.

Can I make this recipe ahead of time?

Yes, you can cook the onions and potatoes separately ahead of time, then combine and reheat when ready to serve.

Can I add cheese to Lyonnaise Potatoes?

Traditional recipes don’t use cheese, but adding grated Gruyère or Parmesan can give a delicious twist.

Is this dish gluten-free?

Yes, all the ingredients in Lyonnaise Potatoes are naturally gluten-free.

Can I use sweet potatoes instead?

While not traditional, sweet potatoes can be used, though the texture and sweetness will differ.

How thin should I slice the potatoes?

Aim for about 1/8 inch thick for even cooking and crisping.

What’s the best way to reheat leftovers?

A skillet or oven is ideal to preserve the crisp texture.

Can I freeze Lyonnaise Potatoes?

Freezing is not recommended, as the texture can become mushy after thawing.

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Conclusion

Lyonnaise Potatoes are the kind of classic side dish that never goes out of style. With just a few staple ingredients and simple techniques, you can create a golden, flavorful, and deeply satisfying plate. Perfect for everyday meals or special occasions, this dish delivers both taste and elegance. Master this once, and you’ll find it becoming a go-to favorite in your kitchen.

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