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Dutch Oven French Onion Soup

A rich and comforting French onion soup slow-cooked in a Dutch oven featuring caramelized onions, savory beef broth, and topped with melted cheese and crusty bread.

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 bay leaf
  • 1 teaspoon fresh thyme leaves (or 1/2 tsp dried thyme)
  • Salt and freshly ground black pepper, to taste
  • Baguette slices, toasted
  • 2 cups grated Gruyère cheese

Instructions

  1. Heat butter and olive oil in a Dutch oven over medium heat.
  2. Add sliced onions, sprinkle with salt and sugar, and cook, stirring frequently until onions are deep golden brown and caramelized, about 45 minutes.
  3. Add minced garlic and cook for 1 more minute.
  4. Pour in white wine to deglaze the pot, scraping up browned bits from the bottom.
  5. Add beef broth, bay leaf, and thyme; bring to a simmer.
  6. Reduce heat to low and let simmer uncovered for 30 minutes. Season with salt and pepper.
  7. Preheat broiler. Ladle soup into oven-safe bowls, place toasted baguette slices on top, and sprinkle generously with Gruyère cheese.
  8. Place bowls under broiler until cheese is melted and bubbly, about 3-5 minutes. Serve immediately.

Notes

For extra richness, add a splash of brandy or sherry before simmering the soup.