Best Ever French Onion Soup Recipe

Experience the rich, savory depth of flavor in this classic French Onion Soup! Our recipe develops incredible caramelized sweetness overnight, resulting in a superior soup that's unbelievably delicious. Prep time excludes the recommended overnight caramelization for maximum flavor.

Prep Time 30 mins
Cook Time 100 mins
Calories 580 kcal
Protein 49g
Rating 5.0 (22 Reviews)
Best Ever French Onion Soup

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Recipe Author

Chef Forktionary, author of this recipe

Passionate home cook & Forktionary contributor.

Ingredients for Best Ever French Onion Soup

  • 4 tablespoons (1/2 stick) unsalted butter
  • Spanish Onions
  • 1 teaspoon salt
  • Flour
  • 12 cups beef broth
  • Red Wine
  • Brandy
  • Bay Leaf
  • 1 teaspoon dried thyme
  • 1/2 teaspoon black pepper
  • Olive Oil
  • Garlic Powder
  • French Bread
  • 1 ounce Gruyère cheese per bowl

How to Make Best Ever French Onion Soup

  1. In a large, heavy-bottomed pot or Dutch oven, melt 4 tablespoons of butter over medium heat. Add 4 pounds of thinly sliced yellow onions and cook, stirring occasionally, until deeply caramelized, about 1 hour. (This step is best done a day ahead).
  2. Add 1/2 cup of all-purpose flour and cook for 1 minute, stirring constantly.
  3. Pour in 12 cups of beef broth and 2 cups of dry sherry (optional). Bring to a boil, then reduce heat and simmer for 30 minutes.
  4. Stir in 1 teaspoon of dried thyme, 1 teaspoon of salt, and 1/2 teaspoon of black pepper.
  5. Preheat your broiler.
  6. Ladle the soup into oven-safe bowls. Top each bowl with 1-2 slices of toasted French baguette and a generous amount of Gruyère cheese (approximately 1 ounce per bowl).
  7. Broil for 2-3 minutes, or until the cheese is melted and bubbly and slightly browned.
  8. Serve immediately and enjoy!

Chef's Tip for Extra Flavor

Elevate your dish with simple flavor boosters! A final flourish of freshly chopped herbs can add incredible brightness, while a squeeze of lemon or lime juice right before serving can awaken all the flavors. Don't underestimate a sprinkle of quality finishing salt or a drizzle of good olive oil to make your creation shine.

Nutrition Information (Approximate per serving)

Sodium

115 g

Sugar

33g

Fat

52g

Carbs

19g