French Onion Soup: Rich, Comforting, and Topped With Golden Cheese

A great French Onion Soup depends on one essential step: slowly caramelizing the onions until they become deeply golden and naturally sweet. They are then simmered with beef broth and herbs before being topped with toasted baguette and bubbling Gruyère cheese. The result is a classic soup that is deeply savory, warming, and worth taking the extra time to make properly.

Prep time: 15 minutes
Cook time: 1 hour 15 minutes
Total time: 1 hour 30 minutes
Servings: 6
Difficulty: Intermediate

Ingredients

• 4 large yellow onions, thinly sliced
• 4 tablespoons unsalted butter
• 1 tablespoon olive oil
• 2 garlic cloves, minced
• ½ cup dry white wine
• 6 cups beef broth
• 1 teaspoon fresh thyme leaves
• 1 bay leaf
• 1 teaspoon Worcestershire sauce
• Salt and black pepper
• 1 baguette, sliced
• 2 cups grated Gruyère cheese

Melt the butter with the olive oil in a large Dutch oven over medium heat. Add the sliced onions and a generous pinch of salt. Cook slowly for 40–50 minutes, stirring regularly, until the onions become deeply golden and caramelized. Do not rush this step—the caramelization is responsible for much of the soup’s flavor.

Add the garlic and cook for 30 seconds, then pour in the white wine and scrape the bottom of the pot to loosen the browned bits. Allow the wine to simmer for a few minutes before adding the beef broth, thyme, bay leaf, and Worcestershire sauce. Bring the soup to a gentle simmer and cook for another 20 minutes. Remove the bay leaf and season with salt and pepper.

Meanwhile, toast the baguette slices until crisp. Ladle the hot soup into oven-safe bowls and place a slice or two of toasted bread on top. Cover generously with grated Gruyère cheese and place the bowls under a broiler for 2–4 minutes, until the cheese is completely melted, bubbling, and golden.

Serve immediately, taking care with the hot bowls. The key to exceptional French onion soup is patience with the onions—properly caramelized onions should be rich brown and intensely flavorful rather than simply soft. Paired with crisp bread and melted Gruyère, the result is one of the most satisfying classic soups you can make at home.