Cheesy Onion, Bacon, and New Potato Gratin Recipe

J. Kenji Lopez-Alt

An easy potato and onion casserole with chunks of bacon and melted Comté cheese under a golden brown crust.

Recipe Facts

Active: 20 mins
Total: 45 mins
Serves: 6 to 8 servings

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  • 2 tablespoons finely chopped fresh parsley leaves

  • 1/2 cup fine bread crumbs

  • 1 medium clove minced garlic (about 1 teaspoon)

  • Kosher salt and freshly ground black pepper

  • 1 1/2 pounds small new potatoes

  • 1 1/2 pounds pearl onions

  • 1/2 pound bacon, cut into 1/2-inch lardons

  • 2 tablespoons heavy cream

  • 6 ounces grated Comté or Gruyère cheese


  1. Adjust an oven rack to center position and preheat oven to 400°F. Whisk together 1 tablespoon parsley, bread crumbs, and garlic in a medium bowl. Season to taste with salt and pepper and set aside.

  2. Place potatoes in a medium saucepan and cover with cold water. Add 2 tablespoons salt and bring to a simmer over medium-high heat. Cook until potatoes are tender, about 10 minutes. Drain and set aside.

  3. Meanwhile, peel onions by cutting off tops and bottoms, scoring a light X on one cut side, and plunging in boiling water for 1 minute. Rinse under cool running water. Peels should come off easily by hand or with the help of a paring knife. Set aside.

  4. Place bacon in a large skillet and cover with 1/4-inch of water. Bring to a simmer over high heat. Cook, shaking pan occasionally, until water has evaporated and bacon begins to crisp. Continue cooking, stirring frequently, until bacon is browned and crisp all over, about 8 minutes total. Add potatoes, onions, heavy cream, and remaining tablespoon parsley and toss to combine. Season to taste with salt and pepper.

  5. Transfer mixture to a rectangular casserole dish. Cover with cheese and transfer to oven. Bake until cheese is melted, about 10 minutes. Remove from oven, sprinkle bread crumb mixture evenly over top and return to oven. Bake until browned and bubbly, about 15 minutes longer. Allow to cool slightly, and serve.

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Nutrition Facts (per serving)
363 Calories
20g Fat
32g Carbs
14g Protein
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Nutrition Facts
Servings: 6 to 8
Amount per serving
Calories 363
% Daily Value*
Total Fat 20g 26%
Saturated Fat 9g 44%
Cholesterol 46mg 15%
Sodium 677mg 29%
Total Carbohydrate 32g 12%
Dietary Fiber 3g 12%
Total Sugars 6g
Protein 14g
Vitamin C 14mg 70%
Calcium 265mg 20%
Iron 2mg 9%
Potassium 693mg 15%
*The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
(Nutrition information is calculated using an ingredient database and should be considered an estimate.)