Jul 13 2026
RestaurantsPetite BoucherieSoupe À L’oignon Recipe

Soupe À L’oignon Recipe

Inspired by Petite Boucherie
Time1h 30m
Serves4

Traditional French onion soup, croutons and Gruyère

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Ingredients

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Soup Base

Croutons

Method

Preparing the Soup

  1. 1

    Caramelize the Onions

    In a large pot, melt the butter and olive oil over medium heat. Add the sliced onions and cook, stirring frequently, until they are caramelized and golden brown (about 30-40 minutes).

  2. 2

    Add Garlic and Deglaze

    Add the minced garlic to the caramelized onions and cook for an additional 1-2 minutes. Pour in the white wine and scrape the bottom of the pot to deglaze. Let it simmer for 5 minutes.

  3. 3

    Add Broth and Season

    Stir in the beef broth, thyme, bay leaf, salt, and pepper. Bring the mixture to a boil, then reduce the heat and let it simmer for 30 minutes.

Making Croutons

  1. 4

    Prepare the Croutons

    Preheat the oven to 375°F (190°C). Slice the baguette into 1-inch thick pieces. In a bowl, mix the olive oil and garlic powder, then brush this mixture onto both sides of the baguette slices.

  2. 5

    Bake the Croutons

    Place the slices on a baking sheet and bake for about 10-15 minutes or until golden and crispy.

Assembling the Soup

  1. 6

    Serve the Soup

    Remove the bay leaf from the soup. Ladle the soup into oven-safe bowls, top with croutons, and sprinkle generously with grated Gruyère cheese.

  2. 7

    Broil the Cheese

    Place the bowls under the broiler for 2-3 minutes, or until the cheese is melted and bubbly. Serve hot.

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