Equipment
Ingredients
Vegetables
- 1000 g yukon gold or agria potatoes, peeled
- 3 garlic cloves, peeled
Dairy
- 500 ml heavy cream, cold
- 250 ml whole milk, cold
- 20 g unsalted butter, softened
Seasonings
- 12 g fine sea salt
- 2 g black pepper, freshly cracked
- 1 g nutmeg, freshly grated
Nutrition (per serving)
Method
Preheat your oven to 160°C/320°F. Position a baking rack in the middle of the oven.
Vigorously rub the inside of the gratin dish with the cut side of the halved garlic clove to release its oils, then coat the interior completely with the softened butter.
Combine the heavy cream, whole milk, crushed garlic cloves, sea salt, black pepper, and nutmeg in the heavy-bottomed saucepan.
Place the saucepan over medium heat and bring the liquid to a very gentle simmer. Immediately remove from heat, cover, and let steep for 15 minutes to infuse the garlic flavor.
Using the mandoline slicer, carefully cut the peeled potatoes into uniform slices exactly 2 millimeters thick. Do not rinse the slices under any circumstances.
Arrange the potato slices in the prepared gratin dish in tight, overlapping layers like roof shingles, working your way up until all slices are used.
Pour the infused warm cream mixture through a fine mesh strainer directly over the layered potatoes, discarding the solid garlic pieces. Press down gently on the potatoes with a spatula so the liquid barely covers the top layer.
Place the dish in the oven and bake for 60 to 75 minutes at 160°C/320°F. The gratin is done when a paring knife glides through the center with zero resistance and the surface is a deep, bubbling mahogany brown.
Remove the gratin from the oven and let it rest undisturbed at room temperature for at least 15 minutes before serving.
Chef's Notes
- Never wash or soak the potatoes after slicing. The surface amylose starch acts as the primary thickening agent that transforms the milk and cream into a velvety, self-binding sauce.
- Authentic Gratin Dauphinois contains absolutely no cheese. The spectacular golden crust is a result of the Maillard reaction occurring between the dairy proteins, lactose, and potato starches.
- A waxy-floury hybrid potato like Yukon Gold or Agria provides the perfect balance: it holds its distinct layered structure during the long bake without dissolving, yet yields a creamy, melt-in-the-mouth texture.
- Infusing the liquid with garlic before baking prevents raw, harsh garlic notes from permeating the dish, resulting in a rounded, sweet allium background profile.
Storage
Refrigerator: 4 days — Cover tightly with food wrap or store in an airtight container to prevent absorbing fridge odors.
Reheating: Reheat in a 150 degree Celsius oven covered with foil for 20 minutes, then uncover for 5 minutes.
