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–+ servings
savory caramelized onion broth

Classic French Onion Soup

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Prep Time 15 minutes
Cook Time 1 hour
Resting Time 10 minutes
Total Time 1 hour 25 minutes
Course Appetizer
Cuisine French
Servings 4 servings

Equipment

  • 1 large pot or Dutch oven
  • 1 Wooden spoon
  • 1 Ladle
  • 1 oven-safe bowl per serving
  • 1 Grater

Ingredients
  

  • 4 tablespoon unsalted butter
  • 2 tablespoon olive oil
  • 6 large onions thinly sliced
  • 1 teaspoon salt
  • 1/2 teaspoon sugar
  • 4 clove garlic minced
  • 1/4 cup all-purpose flour
  • 8 cup beef broth
  • 1/2 cup dry white wine
  • 1 bay leaf
  • 1 teaspoon fresh thyme leaves
  • as needed salt and pepper to taste
  • 1 baguette sliced and toasted
  • 2 cup Gruyère cheese grated

Instructions
 

  • Melt butter with olive oil in a large pot over medium heat.
  • Add sliced onions and cook, stirring occasionally, for about 15-20 minutes until soft.
  • Stir in salt and sugar; continue cooking until onions are deeply caramelized, about 25 minutes more.
  • Add minced garlic and cook for an additional 1-2 minutes.
  • Sprinkle flour over onions, stirring to combine, and cook for another 2 minutes.
  • Gradually add beef broth and wine, stirring constantly to prevent lumps.
  • Add bay leaf and thyme, then bring the mixture to a boil.
  • Reduce heat to low and simmer for 30 minutes, stirring occasionally.
  • Preheat the oven to broil.
  • Season soup with salt and pepper to taste and remove bay leaf.
  • Ladle soup into oven-safe bowls, top with toasted baguette slices, and sprinkle generously with Gruyère cheese.
  • Place bowls under the broiler until the cheese is bubbly and golden brown, about 3-5 minutes.
  • Allow to rest for 10 minutes before serving.

Notes

To achieve the perfect caramelization of onions, be patient and allow them to cook slowly over medium heat, stirring frequently to prevent burning. This step is crucial for developing the rich, sweet flavor characteristic of a classic French onion soup. Additionally, using high-quality beef broth and freshly grated Gruyère cheese will enhance the overall taste and authenticity of the dish.
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