Gratin Dauphinoise

Gratin Dauphinoise

The classic French potato gratin — thinly sliced potatoes layered with garlic in a buttered dish, topped with aged cheddar and bathed in heavy cream until deeply golden.

Prep: 20 min Cook: 2 hr 30 min Servings: 6

Ingredients

  • 3 lb waxy potatoes, peeled and thinly sliced on a mandoline
  • 2 cloves garlic
  • 1 oz (2 tablespoons) butter
  • 1 to 1.5 pints (2 to 3 cups) heavy cream
  • Good aged cheddar, generously grated
  • Salt and black pepper

Instructions

  1. Preheat oven to 325°F (165°C).
  2. Halve the garlic cloves and rub them thoroughly all over the inside of a large Pyrex or baking dish. Butter the dish generously.
  3. Layer the potato slices into the dish as you would for lasagna, seasoning with salt and pepper between each layer.
  4. Grate a generous layer of aged cheddar over the top.
  5. Pour the heavy cream evenly over the dish until it comes about three-quarters of the way up the potatoes.
  6. Bake for approximately 2.5 hours, or until the top is a deep golden brown and the potatoes are completely tender when tested with a knife.

Notes

  • Cheese matters: The original notes specify “expensive cheddar” — a good aged vintage cheddar makes all the difference.
  • Low and slow: The long bake at low heat is what allows the cream to be fully absorbed into the potatoes.
  • Mandoline: The key to a good gratin is even slices. A mandoline is strongly recommended — use a cut-resistant glove.
  • Simpler than it looks: This is a stripped-back, classic version. No fuss, just potatoes, cream, and good cheese.

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