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Dutch Oven French Onion Soup

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

Ingredients

Scale
  • 4 large yellow onions, thinly sliced
  • 4 tablespoons unsalted butter
  • 2 tablespoons olive oil
  • 1 teaspoon salt
  • 1/2 teaspoon sugar
  • 4 cups beef broth
  • 1 cup dry white wine
  • 2 cloves garlic, minced
  • 1 tablespoon all-purpose flour
  • 1 bay leaf
  • 1 teaspoon fresh thyme leaves or 1/2 teaspoon dried thyme
  • Salt and pepper, to taste
  • Baguette slices, toasted
  • 1 1/2 cups grated Gruyère cheese

Instructions

  1. In a Dutch oven, melt butter with olive oil over medium heat. Add sliced onions, salt, and sugar; cook, stirring frequently, until onions are caramelized and golden brown, about 40 minutes.
  2. Stir in minced garlic and cook for 1 minute until fragrant.
  3. Sprinkle flour over onions and cook, stirring constantly, for 2–3 minutes to remove raw flour taste.
  4. Slowly add white wine to deglaze the pot, scraping up any browned bits from the bottom.
  5. Add beef broth, bay leaf, and thyme. Bring to a boil, then reduce heat and simmer uncovered for 20 minutes. Season with salt and pepper to taste.
  6. Preheat the oven broiler.
  7. Ladle soup into oven-safe bowls, place toasted baguette slices on top, and sprinkle generously with Gruyère cheese.
  8. Place bowls on a baking sheet and broil until cheese is melted and bubbly, about 2–3 minutes. Watch closely to avoid burning.
  9. Carefully remove from oven, let cool slightly, and serve hot.

Notes

For an extra rich flavor, substitute half of the beef broth with homemade beef stock, and serve with a side salad for a complete meal.