Fondant potatoes are a French technique where russet potatoes are seared golden brown then slowly braised in butter with garlic and fresh thyme until they become incredibly tender and absorb rich, savory flavor. The key to this dish is the long, gentle simmer that allows the potatoes to become creamy inside while maintaining their golden crust.
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Peel the russet potatoes.
Trim the ends of the potatoes to create flat surfaces, then slice them into thick, 1.5 to 2-inch tall cylinders.
Rinse the potato slices in cold water to remove excess starch.
Thoroughly dry the potato slices with paper towels.
Heat cooking oil in a large skillet over medium-high heat.
Carefully place the potato slices in the hot oil and sear on one side until golden brown.
Flip the potatoes and add the garlic cloves and pearl onions to the pan.
Add the butter to the pan and reduce the heat to medium-low.
Sprinkle with dried parsley and add fresh thyme sprigs. Let the potatoes simmer gently in the foaming butter.
Cook for about 1 hour and 15 minutes, flipping the potatoes every 15 minutes to ensure they cook and brown evenly on both sides.
The potatoes are done when a skewer or cake tester can be inserted with no resistance.
Remove the potatoes from the pan, garnish with flaky sea salt and fresh thyme, and serve immediately.
Store cooled fondant potatoes in an airtight container in the refrigerator for up to 3 days. Reheat gently in a 325°F oven for 10–12 minutes with a splash of butter to restore tenderness.
heavy-bottomed skillet or Dutch oven · cylinder cutter or sharp knife for cutting uniform shapes
Fondant potatoes are braised cylinders of russet potato in butter and stock, while dauphine potatoes are a mixture of potato purée and choux pastry that's fried. Fondant is simpler and butter-based; dauphine is more involved and aerated.
Yes, cut potatoes can be stored in cold water in the refrigerator for up to 4 hours to prevent oxidation. Pat dry before searing.
They're done when a fork pierces the center with no resistance and the liquid has reduced to a glossy glaze coating the potatoes, typically 25–35 minutes of simmering.
Yes, use vegetable stock instead of chicken stock (if stock is used). All other ingredients—butter, potatoes, garlic, onions, thyme, and parsley—are already vegetarian.
Cut into 2-inch cylinders or rounds using a knife or cylinder cutter. Uniform size ensures even cooking.
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