A classic French potato gratin baked in garlic-infused cream until tender and deeply golden on top.
Gratin dauphinois hails from the Dauphiné region in southeastern France and is, in its most traditional form, deceptively simple — thinly sliced potatoes baked slowly in cream and garlic, with no cheese and no eggs, letting the potato's own starch thicken the cream into a rich, silky sauce. Many modern versions add cheese, but purists in the region insist the original relies entirely on potato, cream, garlic and a long, gentle bake.\n\nThe technique that separates a great gratin from a mediocre one is slicing the potatoes thin and uniform, ideally with a mandoline, so every layer cooks through at the same rate — thick or uneven slices leave some parts al dente and others mushy by the time the top is properly browned. Rubbing the baking dish with a cut garlic clove before layering, rather than mixing raw garlic directly into the cream, gives a more subtle, background garlic flavor that doesn't overpower the potato.\n\nServe hot from the oven as a rich side dish alongside roast meat — this is the kind of dish that improves any Sunday dinner table.
Serves 6
Preheat oven to 325°F (165°C). Rub a baking dish thoroughly with the halved garlic clove, then butter it generously.
Slice potatoes very thin and even, about 1/8 inch (3mm), ideally using a mandoline. Do not rinse them — the surface starch helps thicken the cream.
In a saucepan, warm cream, milk, minced garlic, salt, nutmeg and pepper over medium heat until just steaming, not boiling.
Arrange potato slices in overlapping layers in the prepared dish. Pour the warm cream mixture evenly over the top, pressing down gently so the potatoes are mostly submerged.
Slice the potatoes as thin and uniform as possible — a mandoline makes a real difference here, since uneven thickness leads to some potatoes being underdone while others turn to mush.
Cover with foil and bake 45 minutes, then remove the foil and bake 25-30 more minutes until the top is deeply golden and a knife slides through the potatoes with no resistance.
Let rest 10 minutes before serving — this lets the cream fully set so the gratin holds together when scooped.
Slice the potatoes uniformly thin, ideally with a mandoline — this is genuinely the difference between a great gratin and an uneven one.
Don't rinse the sliced potatoes; their surface starch is what naturally thickens the cream into a rich sauce as it bakes.
Let the gratin rest at least 10 minutes after baking before serving so it holds its shape when scooped instead of running everywhere.
Add a layer of grated Gruyère between the potato layers for a cheesier, richer modern version (many home cooks do this despite it not being traditional).
Use half cream and half whole milk for a slightly lighter version without losing much richness.
Add thinly sliced onion between the potato layers for extra sweetness and depth.
Refrigerate covered for up to 4 days. Reheat covered in a 325°F (165°C) oven until warmed through — the texture holds up well to reheating.
Gratin dauphinois takes its name from the historic Dauphiné region in southeastern France, and the traditional version, without cheese, is protected by strong local opinion about what does and doesn't belong in an authentic gratin — cheese, in particular, is considered a modern addition that purists reject. It remains a staple side dish for French Sunday roasts and holiday meals.
No — the classic, historically accurate version from the Dauphiné region uses only potato, cream, garlic and nutmeg, though many modern recipes (including outside France) add Gruyère or another cheese, which some purists consider incorrect.
That usually means the potatoes were rinsed before layering, which washes away the surface starch needed to thicken the cream, or the gratin wasn't rested long enough after baking.
Yes — bake it fully a day ahead, refrigerate, then reheat covered in a low oven until warmed through; the flavor actually deepens overnight.
Per serving (260g / 9.2 oz) · 6 servings total
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