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French Onion Potato Bake

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This French Onion Potato Bake combines the rich flavors of caramelized onions, creamy potatoes, and melted cheese for a comforting, indulgent side dish. A perfect addition to any meal, this bake is creamy, cheesy, and packed with flavor.

Ingredients

  • 4 large russet potatoes, peeled and thinly sliced
  • 2 large onions, thinly sliced
  • 2 tablespoons butter
  • 1 cup heavy cream
  • 1/2 cup sour cream
  • 1 cup shredded Swiss cheese (or Gruyere)
  • 1/2 cup grated Parmesan cheese
  • 2 cloves garlic, minced
  • Salt and pepper to taste
  • 1 teaspoon dried thyme (or rosemary)
  • 1/2 cup breadcrumbs (optional for topping)
  • Fresh parsley for garnish

Instructions

  • Preheat oven to 375°F (190°C). Grease a 9×13-inch baking dish with butter or cooking spray.
  • Caramelize the onions: In a large skillet, melt butter over medium heat. Add the sliced onions and cook, stirring frequently, for about 10-15 minutes until the onions are soft and golden brown. Add garlic and cook for another minute until fragrant. Remove from heat.
  • Prepare the cream mixture: In a bowl, combine the heavy cream, sour cream, thyme, salt, and pepper. Stir in half of the Swiss cheese and all of the Parmesan cheese.
  • Layer the potatoes: Place a layer of thinly sliced potatoes in the bottom of the prepared baking dish. Top with a layer of caramelized onions. Repeat layers until all potatoes and onions are used, finishing with a layer of the cream mixture.
  • Top with cheese and breadcrumbs: Sprinkle the remaining Swiss cheese on top, followed by breadcrumbs (if using).
  • Bake: Cover the dish with foil and bake for 45-50 minutes, until the potatoes are tender. Remove the foil and bake for an additional 10 minutes until the top is golden and bubbly.
  • Serve: Let the dish rest for 5 minutes before serving. Garnish with fresh parsley.

Notes

  • You can add cooked bacon or crispy pancetta between the layers for added flavor.
  • Use a mandoline slicer for evenly sliced potatoes.
  • If you prefer a lighter version, substitute the heavy cream with half-and-half or use a reduced-fat sour cream.