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French Onion Soup

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A classic French onion soup made with slow-caramelized onions, rich beef broth, and topped with crusty bread and melted cheese for a comforting and flavorful dish.

Ingredients

Scale
  • 4 large yellow onions, thinly sliced
  • 4 tbsp unsalted butter
  • 2 tbsp olive oil
  • 1 tsp sugar
  • 1 tsp salt
  • 4 cups beef broth
  • 2 cups chicken broth
  • 1/2 cup dry white wine
  • 2 tbsp all-purpose flour
  • 1 bay leaf
  • 2 tsp fresh thyme leaves (or 1 tsp dried thyme)
  • 1 baguette, sliced
  • 2 cups grated Gruyère cheese
  • Salt and pepper to taste

Instructions

  1. In a large pot, melt butter with olive oil over medium heat.
  2. Add sliced onions, salt, and sugar; cook slowly, stirring often, until onions are caramelized and golden brown, about 30–40 minutes.
  3. Sprinkle in flour and stir for 1–2 minutes to remove the raw taste.
  4. Pour in the wine, scraping the bottom of the pot to deglaze.
  5. Add beef broth, chicken broth, bay leaf, and thyme; bring to a simmer and cook for 20–30 minutes.
  6. Season with salt and pepper to taste, then remove bay leaf.
  7. Preheat the broiler. Place baguette slices on a baking sheet and toast until golden.
  8. Ladle soup into oven-safe bowls, top each with a slice or two of toasted baguette, and sprinkle generously with Gruyère cheese.
  9. Place bowls under the broiler until cheese is melted and bubbly, then serve hot.

Notes

  • For a deeper flavor, use homemade beef stock.
  • You can substitute Gruyère with Swiss or Emmental cheese.
  • Caramelizing onions slowly is key to developing the rich flavor.

Nutrition

Keywords: French onion soup, caramelized onions, Gruyère cheese, classic French soup, comfort food

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