
Few dishes are as quietly showstopping as this classic French potato cake, and the good news is that every single ingredient here is naturally free of citrus in any form. Yukon Golds are the star — their creamy, buttery flesh holds together beautifully when sliced thin and layered with clarified butter, thyme, and a little salt. The clarifying step is worth the extra few minutes: it removes the milk solids and gives you a pure, golden fat that crisps each layer without burning, producing that deeply lacquered bottom crust that makes the whole thing worth inverting onto a plate. Pressing the layers down as it bakes is the secret to getting those tight, cohesive slices that fan out like a savory tart when you cut into it. Fresh parsley scattered on top at the end adds a pop of color and a mild herbal note that keeps things bright without any acidic squeeze. This is the kind of side dish that looks like it came from a bistro kitchen but relies entirely on pantry staples and patience. Serve it straight from the skillet while the edges are still crackling.
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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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