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Boulangère Potatoes (French Onion Potato Bake) Recipe

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4.2 from 70 reviews

Boulangère Potatoes is a classic French dish featuring thinly sliced floury potatoes and caramelized onions baked slowly in vegetable stock and butter, infused with rosemary and finished with a golden Parmesan crust. It is a comforting and flavorful side dish perfect for any meal.

  • Total Time: 1 hour 25 minutes
  • Yield: 4 servings

Ingredients

Potatoes

  • 800 g (1.76 lb) floury potatoes, peeled

Aromatics & Herbs

  • 2 small brown onions, peeled and thinly sliced
  • 3 sprigs of rosemary, very finely chopped

Liquids & Fats

  • 30 g (2 tablespoons) butter plus extra for greasing the dish
  • 300 ml (1⅓ cups) vegetable stock

Seasoning

  • ½ teaspoon salt
  • ¼ teaspoon black pepper

Toppings

  • 60 g (⅖ cups) Parmesan, finely grated

Instructions

  1. Preheat and Prepare Dish: Preheat your oven to 180°C (350°F). Grease an ovenproof dish generously with butter to prevent sticking and add a rich flavor to the potatoes.
  2. Slice Potatoes and Onions: Peel the potatoes and slice them thinly and evenly to ensure uniform cooking. Thinly slice the onions as well to allow them to caramelize nicely during baking.
  3. Layer Ingredients: Layer half of the sliced potatoes evenly in the bottom of the greased dish. Spread all the sliced onions over the potatoes, then sprinkle the finely chopped rosemary on top. Add the remaining potatoes in an even layer.
  4. Add Seasoning and Stock: Sprinkle the salt and black pepper evenly over the layered potatoes and onions. Dot the 30 g of butter evenly over the top layers. Pour the vegetable stock gently over the contents of the dish ensuring it reaches the bottom.
  5. Bake the Potatoes: Cover the dish with aluminum foil and place it in the preheated oven. Bake for approximately 50 minutes, or until the potatoes are tender when pierced with a fork.
  6. Add Parmesan and Finish Baking: Remove the foil carefully and sprinkle the grated Parmesan evenly on top of the potatoes. Return the dish to the oven and bake uncovered for another 15–20 minutes or until the cheese topping is golden and crisp.
  7. Serve Warm: Once baked, let the boulangère potatoes rest for a few minutes before serving. This allows the flavors to meld and the dish to set slightly, making it easier to serve.

Notes

  • Use floury potatoes like Maris Piper or Russet for the best texture.
  • For a richer flavor, you can substitute vegetable stock with chicken stock if not vegetarian.
  • Ensure potato slices are uniform in thickness for even cooking.
  • The dish can be prepared in advance and baked just before serving.
  • Leftovers can be reheated in the oven to maintain the crispy cheese topping.
  • Author: Madelynn
  • Prep Time: 15 minutes
  • Cook Time: 1 hour 10 minutes
  • Category: Side Dish
  • Method: Baking
  • Cuisine: French
  • Diet: Vegetarian

Find it online: https://allyumcooks.com/boulangere-potatoes-french-onion-potato-bake-recipe/