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Irresistible Blue Cheese Potato Gratin Recipe with Caramelized Onions

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A rich and creamy potato gratin layered with tangy blue cheese and sweet caramelized onions, perfect for cozy dinners or holiday gatherings.

Ingredients

Scale
  • 2 pounds Yukon Gold or Russet potatoes, peeled and sliced thinly (1/8 inch or 3 mm thick)
  • 6 ounces crumbled blue cheese (Stilton or Roquefort recommended)
  • 2 large yellow onions, thinly sliced
  • 1 1/2 cups heavy cream
  • 2 cloves garlic, minced
  • 2 tablespoons unsalted butter
  • 1 teaspoon fresh thyme leaves (or 1/2 teaspoon dried thyme)
  • Salt and pepper to taste
  • Pinch of freshly grated nutmeg
  • 1 teaspoon olive oil

Instructions

  1. Preheat the oven to 350°F (175°C).
  2. Heat 1 tablespoon butter and 1 teaspoon olive oil in a large skillet over medium-low heat. Add the thinly sliced onions and a pinch of salt. Cook slowly, stirring occasionally, for about 30 minutes until the onions are deeply golden and sweet.
  3. While the onions caramelize, peel and slice the potatoes into 1/8 inch (3 mm) thin rounds. Rinse them in cold water to remove excess starch, then pat completely dry with a clean towel.
  4. In a mixing bowl, combine heavy cream, minced garlic, fresh thyme leaves, a pinch of nutmeg, and salt and pepper to taste.
  5. Butter a 9×13 inch (23×33 cm) baking dish generously to prevent sticking.
  6. Arrange a single layer of potato slices on the bottom of the dish. Sprinkle a bit of caramelized onions and crumbled blue cheese over the layer. Repeat layering potatoes, onions, and cheese until all ingredients are used, finishing with a layer of blue cheese on top.
  7. Slowly pour the cream mixture over the layered potatoes, letting it seep through the layers. The potatoes should be mostly covered.
  8. Cover the dish tightly with aluminum foil and bake for 45 minutes.
  9. Remove the foil and bake for an additional 15-20 minutes until the top is golden and bubbly.
  10. Let the gratin rest for about 10 minutes before serving.

Notes

Slow caramelization of onions is key for sweetness and depth of flavor. Slice potatoes uniformly thin and rinse/dry to avoid gummy texture. Season cream mixture lightly due to salty blue cheese. Let gratin rest 10 minutes after baking for easier serving and better texture. Cover with foil during initial baking to ensure tender potatoes.

Nutrition

Keywords: blue cheese, potato gratin, caramelized onions, comfort food, easy dinner, creamy potatoes, vegetarian, gluten-free

Find it online: https://blairrecipes.com/irresistible-blue-cheese-potato-gratin-recipe-with-caramelized-onions-easy-and-perfect-for-dinner/