Creamy layered potato gratin baked until golden, finished with a drizzle of nutty browned butter.
Kartoffelgratin is Germany's version of a layered potato bake, thinly sliced potatoes layered with cream, garlic and cheese, then baked until the top turns deeply golden and the inside is meltingly tender. It's a common side dish at German Sunday roasts, sturdy enough to hold its own against a rich braised meat. The technique relies on slicing the potatoes thin and even, ideally with a mandoline, so each layer cooks through at the same rate; unevenly cut slices leave some parts raw while others turn mushy. A final drizzle of browned butter poured over the top right out of the oven adds a nutty depth that plain cream alone doesn't provide, a small but meaningful finishing touch. Baked low and slow, the gratin needs patience: rushing the oven time with higher heat browns the top before the potatoes underneath have softened.
Serves 6
Preheat oven to 160C (325F). Whisk cream, milk, garlic, nutmeg, salt and pepper in a saucepan and warm gently over low heat, not boiling.
Arrange a layer of potato slices in a buttered baking dish, slightly overlapping. Pour some cream mixture over, then sprinkle a little cheese. Repeat layers, finishing with cream and cheese on top.
Cover with foil and bake 40 minutes.
Remove foil and bake 15-20 more minutes until the top is deeply golden and a knife slides easily through the potatoes.
While the gratin rests, melt butter in a small pan until golden and nutty, about 4 minutes. Drizzle over the gratin just before serving.
Slice the potatoes as evenly as possible, ideally with a mandoline, so every layer cooks at the same rate.
Keep the oven at a moderate 160C (325F) for most of the bake; too hot and the top browns before the potatoes soften through.
Let the gratin rest 10 minutes after baking so it sets slightly and is easier to slice into neat portions.
Add thinly sliced onion between the potato layers for extra flavor and sweetness.
Use a mix of gruyere and emmental for a more complex, nuttier cheese flavor.
Skip the browned butter finish for a simpler, more traditional version if you prefer a plain cream sauce.
Refrigerate up to 4 days in an airtight container. Reheat covered in a 175C (350F) oven for 20 minutes until warmed through; the microwave can make the top soggy.
Kartoffelgratin, closely related to French gratin dauphinois, has become a common side dish in German home cooking, especially for Sunday roasts and holiday meals, where a rich, creamy potato bake pairs well with braised or roasted meats.
Yes, assemble it a day ahead and refrigerate covered, then bake when ready; add about 10 extra minutes to the covered baking time since it will start cold.
The slices were probably cut too thick, or the oven temperature was too high, browning the top before the interior had time to soften. Slice thinner and bake longer at a lower temperature next time.
Yes, emmental, fontina or even a sharp cheddar work well; just avoid very soft cheeses that won't hold their structure through the long bake.
Per serving (320g / 11.3 oz) · 6 servings total
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