Classic Potato Gratin

Bon Appetit

Ready in: 45 minutes
Servings: 12
Gluten Free
Very Popular

Ingredients

  • 1 teaspoon freshly ground black pepper
    Spices and Seasonings
  • 5 garlic cloves, divided
    Produce
  • 3 ounces Gruyère, finely grated
    Cheese
  • 2½ cups heavy cream
    Milk, Eggs, Other Dairy
  • 1 tablespoon kosher salt
    Spices and Seasonings
  • 1 ounce Parmesan, finely grated
    Cheese
  • 4 pounds russet potatoes, scrubbed, very thinly sliced on a mandoline
    Produce
  • 2 medium shallots, quartered through root ends
    Produce
  • 1 tablespoon thyme leaves, plus more
    Produce
  • 1 tablespoon unsalted butter, room temperature
    Milk, Eggs, Other Dairy

Steps

  • Preheat oven to 32
  • Cut 1 garlic clove in half and rub the inside of a 3-qt. shallow baking dish with cut sides. Smear butter all over inside of dish. Bring shallots, cream, salt, pepper, 1 Tbsp. thyme, and remaining 4 garlic cloves to a simmer in a small saucepan over low heat; cook until shallots and garlic are very soft, 1520 minutes.
  • Let cool slightly.
  • Transfer to a blender; blend until smooth.Arrange potato slices in prepared dish, fanning out a handful at a time and placing in dish at an angle (this ensures every scoop will have tender potatoes from the bottom and crisp edges from the top). Shingle as you work until bottom of dish is covered. Tuck smaller slices into any gaps to fill.
  • Pour cream mixture over potatoes and cover dish tightly with foil.
  • Bake potatoes until tender and creamy, 6075 minutes.
  • Let cool.
  • Place rack in highest position; heat broiler.
  • Remove foil and top potatoes with Gruyre and Parmesan. Broil until cheese is bubbling and top of gratin is golden brown, 510 minutes.
  • Serve topped with more thyme leaves.Do Ahead: Gratin can be baked 1 day ahead. Cover and chill. Bring to room temperature before broiling.

Nutrition

  • Calories: 343.28  cal  (17.16%)
  • Fat: 22.34  g  (34.37%)
  • Saturated Fat: 13.79  g  (86.21%)
  • Carbohydrates: 30.17  g  (10.06%)
  • Sugar: 1.38  g  (1.53%)
  • Cholesterol: 79.84  mg  (26.61%)
  • Sodium: 670.36  mg  (29.15%)
  • Protein: 7.45  g  (14.91%)
  • Vitamin B6: 0.57  mg  (28.74%)
  • Potassium: 700.69  mg  (20.02%)
  • Phosphorus: 178.75  mg  (17.87%)
  • Vitamin A: 874.09  IU  (17.48%)
  • Calcium: 159.06  mg  (15.91%)
  • Manganese: 0.31  mg  (15.27%)
  • Vitamin C: 10.57  mg  (12.82%)
  • Magnesium: 44.28  mg  (11.07%)
  • Vitamin B1: 0.15  mg  (9.71%)
  • Fiber: 2.25  g  (9.0%)
  • Copper: 0.18  mg  (8.76%)
  • Iron: 1.54  mg  (8.56%)
  • Vitamin B3: 1.63  mg  (8.14%)
  • Vitamin B2: 0.14  mg  (8.1%)
  • Vitamin B5: 0.66  mg  (6.58%)
  • Folate: 25.81  µg  (6.45%)
  • Zinc: 0.94  mg  (6.27%)
  • Vitamin K: 4.95  µg  (4.71%)
  • Vitamin E: 0.6  mg  (3.98%)
  • Vitamin B12: 0.23  µg  (3.88%)
  • Selenium: 2.66  µg  (3.8%)
  • Vitamin D: 0.42  µg  (2.79%)

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