Gratin Dauphinois
A potato gratin from Dauphiné, where the slices are first poached in garlic milk and cream before baking golden — no cheese, just pure creaminess.
The potatoes first get a brief, gentle simmer in the seasoned milk and cream before being layered tightly in the dish and baked golden. As the gratin bakes, the cream comes together between the layers; after resting, it can be cut neatly. The crucial factor is preserving the potato starch and poaching the slices without boiling them.
Ingredients
- 1.2 kg waxy potatoes, peeled
- 2 clove garlic, one halved, one crushed
- 4 dl whole milk
- 4 dl heavy cream
- 30 g butter
- 2 tsp salt
- 1 pinch nutmeg, freshly grated
- black pepper, freshly ground
How to make it
- Preheat the oven to 160°C so it's fully heated by the time the gratin goes in.
- Rub the entire inside of the baking dish with the cut side of the halved garlic clove, until the dish clearly smells of garlic. Then butter the dish with half the butter, so the surface is glossy all the way to the edge.Chef's tip The film of butter makes it easier to lift the outermost pieces out whole and keeps the milk proteins from scorching onto the edge. The dish should be glossy all over, not just on the bottom.
- Cut the peeled potatoes into 2-3 mm thin slices with a sharp knife. Don't rinse them afterward, since the starch on the slices is what binds the milk and cream into a creamy mass. The slices are thin enough when they can bend slightly without snapping. ⏱ 10 minChef's tip Even thickness matters more than the exact millimeter: thick slices among thin ones give you layers that are still hard when the rest are tender. Never hold them in water in the meantime — that rinses off the starch that does the binding.
- Put the whole milk, heavy cream, the crushed garlic clove, salt, pepper, and nutmeg in a large pot. Heat over medium heat until steam rises and small bubbles gather along the edge.Chef's tip Keep it at the shivering stage — steam and edge bubbles, not a rolling boil. Cream at a full boil can break, leaving grainy specks and a greasy film on the finished gratin.
- Add the potato slices to the hot milk-cream mixture and gently separate them with a spoon so they don't clump together. Let them poach over low heat for 10 minutes, stirring gently a couple of times along the way. The liquid should thicken, and a slice should just barely be able to be divided with the spoon without falling apart. ⏱ 10 minChef's tip Poaching does double duty: it releases starch into the liquid so it thickens before baking, and it gives the slices a head start so the oven only has to set the custard. Stir with a light hand — over-stirring frays the edges into mush.
- Lift the poached potato slices out with a slotted spoon and arrange them in the dish in tight, overlapping layers. Press lightly on each layer with the back of your hand so the layers lie flat without air pockets and the surface is even.
- Pour the hot milk mixture from the pot over the top, until it just barely covers the top layer of potatoes. Dot the remaining butter in small pieces over the surface of the gratin so the top browns evenly.
- Bake the gratin in the middle of the oven for 60-70 minutes, until the surface is deeply golden and bubbling slowly at the edges. A thin knife should glide through all the layers without resistance. ⏱ 1 h–1 h 10 min · passiveChef's tip 160°C is deliberately low: the gratin is essentially a custard, and hotter ovens curdle the dairy before the potatoes soften. If the top darkens well before the knife slides through, cover loosely with foil and keep baking.
- Remove the dish and let the gratin rest for 15 minutes on the counter, so the cream sets and the layers can be cut without sliding apart. ⏱ 15 min · passiveChef's tip Straight from the oven the cream is still fluid and will run out of the cut. Fifteen minutes lets it set enough to hold a square edge — the gratin should stop bubbling and settle slightly in the dish.
- Set the dish directly on the table and cut the gratin into squares with an offset spatula, so each piece lifts out with all its layers.
