Classic French Onion Soup

French onion soup is more than just a dish; it is a culinary classic that embodies the essence of comfort food. With its rich, caramelized flavors and aromatic broth topped with crusty bread and melted cheese, this soup has earned a cherished place in the hearts of food lovers around the world. Originating from France, it is a staple in bistros and home kitchens alike, known for its ability to warm both the body and the soul.

Discover the savory elegance of classic French onion soup, a timeless dish that warms the soul. With deeply caramelized onions, rich broth, and a decadent layer of melted cheese on crusty bread, this culinary masterpiece combines comfort with sophistication. The process of making it requires patience and attention, turning humble ingredients into something extraordinary. Perfect as a starter or main course, this dish invites gathering and sharing, making it a true favorite for any occasion. Dive into the art of creating this heartwarming soup and experience the delight it brings to your table.

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Ingredients

4 large yellow onions, thinly sliced

4 tablespoons unsalted butter

1 tablespoon olive oil

1 teaspoon sugar

1 teaspoon kosher salt

1/4 teaspoon freshly ground black pepper

1 tablespoon all-purpose flour

8 cups beef or vegetable broth

1 cup dry white wine or sherry (optional)

1 bouquet garni (1 sprig of fresh thyme, 1 bay leaf, and a few parsley stems tied together)

Baguette or your favorite crusty bread, sliced

2 cups grated Gruyère cheese

1/2 cup grated Parmesan cheese

Instructions

Caramelize the Onions: In a large, heavy-bottomed pot, combine the butter and olive oil over medium heat. Once melted, add the sliced onions along with the sugar, salt, and pepper. Cook, stirring frequently, for 30-40 minutes, allowing the onions to become deeply browned and caramelized. Adjust the heat if necessary to prevent burning at any stage.

Thicken the Soup: When the onions have reached a rich caramel color, sprinkle the flour evenly over them and stir to combine. Cook for an additional 2-3 minutes, allowing the flour to cook slightly and thicken the mixture.

Add Liquids: Gradually pour in the white wine (if using), scraping the bottom of the pot to release any flavorful bits. Let this simmer for about 5 minutes to reduce slightly. Following this, add the broth and the bouquet garni to the pot. Stir to combine.

Simmer the Soup: Increase the heat to bring the soup to a gentle simmer. Cook uncovered for 30-40 minutes, allowing the flavors to meld beautifully. Taste and adjust the seasoning as necessary.

Prepare the Bread: While the soup is simmering, preheat your oven to 400°F (200°C). On a baking sheet, arrange the baguette slices in a single layer. Toast them in the oven for about 10 minutes, or until they are golden brown and crispy.

Assemble the Bowls: Once the soup is done simmering, remove the bouquet garni. Ladle the hot soup into oven-safe bowls, ensuring they are generously filled. Place a slice of the toasted baguette on top of each bowl, followed by a generous sprinkle of Gruyère and Parmesan cheeses.

Broil to Perfection: Arrange the bowls on a baking sheet for easy handling. Broil in the oven for 3-5 minutes, or until the cheese is fully melted and bubbly, keeping a watchful eye to prevent burning.

Serve: Once out of the oven, let the bowls cool slightly before serving. Garnish with fresh thyme leaves if desired, and enjoy your elegant French onion soup hot.

Prep Time: 15 minutes | Total Time: 1 hour 15 minutes | Servings: 4-6