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A steaming bowl of French onion soup with melted cheese and croutons

French Onion Soup

This recipe guides you through making a classic French Onion Soup, emphasizing the slow caramelization of onions to achieve a rich, deep flavor, topped with toasted bread and gooey melted cheese.
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Prep Time 15 minutes
Cook Time 1 hour
Total Time 1 hour 15 minutes
Servings: 4 people
Calories: 350
Ingredients Equipment Method Notes

Ingredients
  

Main Ingredients
  • 3 large yellow onions
  • 2 tbsp butter
  • 6 cups beef broth
  • 0.5 cup dry white wine
  • 1 tbsp all-purpose flour
  • 4 slices baguette
  • 1 cup Gruyere cheese, shredded
  • salt to taste
  • black pepper to taste

Equipment

  • Large pot or Dutch oven
  • Oven-safe bowls
  • Broiler

Method
 

Preparation
  1. Slice the onions thinly and melt butter in a large pot or Dutch oven over medium heat.
  2. Add the sliced onions to the pot and cook for 30-40 minutes, stirring occasionally, until deeply caramelized and golden brown.
  3. Sprinkle flour over the caramelized onions and stir for 2 minutes.
  4. Pour in the white wine, scraping any browned bits from the bottom of the pot, and cook for 5 minutes until reduced.
  5. Add beef broth, salt, and pepper; bring to a simmer and cook for at least 20 minutes.
  6. While the soup simmers, toast baguette slices until golden brown and preheat your broiler.
  7. Ladle the hot soup into oven-safe bowls, place a toasted baguette slice on top of each, and sprinkle with Gruyere cheese.
  8. Broil for 2-3 minutes, watching carefully, until the cheese is bubbly and golden brown.

Notes

Caramelizing the onions slowly is crucial for developing the rich flavor of the soup. Do not rush this step!