Jul 14 2026

French Onion Recipe

Time1h 15m
Serves4

Au Gratin

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Ingredients

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French Onion Au Gratin

Method

Preparation Steps

  1. 1

    Sauté the Onions

    In a large pot or Dutch oven, melt the butter over medium heat. Add the sliced yellow onions and cook, stirring frequently, until they are caramelized and golden brown, about 25-30 minutes.

  2. 2

    Add the Liquid Ingredients

    Once the onions are caramelized, pour in the beef broth and dry white wine. Add thyme, bay leaf, salt, and black pepper, and bring the mixture to a gentle simmer. Let it cook for another 20 minutes to allow the flavors to meld.

  3. 3

    Prepare the Baguette

    While the soup simmers, preheat your oven to 350°F (175°C). Place the sliced baguette on a baking sheet and toast in the oven for about 10 minutes, or until lightly crispy.

  4. 4

    Assemble the Au Gratin

    Remove the bay leaf from the soup. Ladle the French onion soup into oven-safe bowls or ramekins. Place the toasted baguette slices on top of the soup, then generously sprinkle with Gruyère and Parmesan cheese.

  5. 5

    Broil the Cheese

    Place the bowls under the broiler for 3-5 minutes, or until the cheese is melted, bubbly, and golden brown. Keep an eye on them to prevent burning.

  6. 6

    Serve

    Carefully remove the bowls from the oven and let them cool slightly before serving. Enjoy your delicious French Onion Au Gratin!

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