
Few dishes are as quietly showstopping as this classic French potato cake, built from nothing but thinly sliced Yukon Golds, clarified butter, thyme, and salt. The ingredient list is almost shockingly short, which is exactly the point — every element earns its place, and there's zero room for unnecessary additives or synthetic dyes to sneak in. Yukon Golds bring a naturally buttery flavor and a gorgeous golden color that comes entirely from the potato itself and the clarified butter crisping up in the pan, no artificial enhancement needed. Clarifying the butter is a small extra step that pays off enormously, giving you a pure, nutty fat that crisps the layers without burning and keeps the whole cake cohesive. The technique of pressing the layers down as they cook is what transforms a pile of potato slices into something that unmolds like a dream, revealing a lacquered, caramelized top that looks like it came out of a Parisian bistro kitchen. Fresh thyme woven between the layers adds an herbal note that feels elegant without complicating the clean, whole-ingredient profile. Serve it in wedges straight from the pan and watch it disappear.
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Preheat the oven to 425°F (220°C). Melt the butter in a small saucepan over low heat, then let it sit undisturbed for 2 minutes. Skim the white foam from the surface and carefully pour the clear golden liquid into a small bowl, leaving the milky solids behind — you should have about 4 tbsp clarified butter.
Using a mandoline or a sharp knife, slice the peeled potatoes into rounds approximately 1/8-inch (3mm) thick. Do not rinse or soak the slices — the surface starch helps the layers bind.
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