Ingredients
Scale
- 4 large onions, thinly sliced
- 2 tablespoons butter
- 1 tablespoon olive oil
- 1 teaspoon sugar
- 1 teaspoon salt
- 2 tablespoons all-purpose flour
- 8 cups beef broth
- 1/2 cup dry white wine
- 1 bay leaf
- 1 teaspoon dried thyme
- Salt and pepper to taste
- 1 baguette, sliced and toasted
- 2 cups Gruyère cheese, shredded
Instructions
- Caramelize Onions: In a large pot, melt butter with olive oil over medium heat. Add onions, sugar, and salt. Cook, stirring frequently, until onions are soft and golden, about 25-30 minutes.
- Make the Roux: Sprinkle flour over the caramelized onions and cook for 1-2 minutes, stirring constantly.
- Simmer the Soup: Gradually add beef broth, white wine, bay leaf, and thyme to the pot. Bring to a simmer and let cook for about 30 minutes. Season with salt and pepper to taste.
- Prepare for Broiling: Preheat the broiler. Ladle soup into oven-safe bowls. Top each with a slice of toasted baguette and a generous amount of Gruyère cheese.
- Broil: Place the bowls under the broiler until the cheese is bubbly and golden brown, about 2-3 minutes.
- Prep Time: 10 minutes
- Cook Time: 60 minutes