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Dutch Oven French Onion Soup

This rich and savory Dutch Oven French Onion Soup features caramelized onions simmered in a flavorful broth, topped with toasted bread and melted cheese for a comforting classic.

Ingredients

Scale
  • 4 large yellow onions, thinly sliced
  • 4 tablespoons unsalted butter
  • 2 tablespoons olive oil
  • 1 teaspoon salt
  • 1 teaspoon sugar
  • 4 cloves garlic, minced
  • 2 tablespoons all-purpose flour
  • 8 cups beef broth
  • 1/2 cup dry white wine (optional)
  • 1 bay leaf
  • Fresh thyme sprigs, 2–3
  • Salt and freshly ground black pepper, to taste
  • 1 baguette, sliced
  • 2 cups grated Gruyère cheese

Instructions

  1. Heat the butter and olive oil in a Dutch oven over medium heat until melted and fragrant.
  2. Add the sliced onions, salt, and sugar; cook, stirring frequently, until onions are deeply caramelized and golden brown, about 40–45 minutes.
  3. Stir in the minced garlic and cook for 1 minute until fragrant.
  4. Sprinkle the flour over the onions and stir well to combine; cook for 2–3 minutes to remove raw flour taste.
  5. Gradually add the beef broth, stirring continuously to prevent lumps.
  6. Add white wine (if using), bay leaf, and thyme; bring soup to a gentle simmer and cook for 30 minutes to meld flavors.
  7. Season with salt and black pepper to taste. Remove bay leaf and thyme sprigs.
  8. Preheat the oven broiler. Ladle soup into oven-safe bowls, place a slice of baguette on top of each, and sprinkle generously with Gruyère cheese.
  9. Place bowls on a baking sheet and broil until cheese is melted, bubbly, and golden, about 3–5 minutes.
  10. Carefully remove from oven and serve immediately.

Notes

For an extra depth of flavor, use homemade beef broth, and serve with a fresh green salad for a complete meal.