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–+ servings
World's Best Onion Soup

World's Best Onion Soup

Discover the World's Best Onion Soup recipe with caramelized onions, rich beef broth, and gooey Gruyère cheese. Perfect for cozy nights in.
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Prep Time 15 minutes
Cook Time 55 minutes
Total Time 1 hour 10 minutes
Servings: 4 people
Calories: 390
Ingredients Equipment Method Nutrition Notes

Ingredients
  

  • 4 large yellow onions
  • 1 liter beef broth
  • 200 g Gruyère cheese
  • 1 baguette baguette
  • 50 g butter
  • 1 tablespoon olive oil
  • 1 tablespoon flour
  • 1 sprig thyme
  • 2 leaves bay leaves
  • to taste salt and pepper

Equipment

  • Large pot or Dutch oven
  • Sharp knife and cutting board
  • Oven-safe bowl or ramekin
  • Whisk or wooden spoon
  • Baking tray

Method
 

  1. Start by slicing the onions into thin, even strips.
  2. In a large pot, melt the butter with the olive oil over medium heat. Add the sliced onions and cook, stirring frequently, for about 20 to 25 minutes until golden brown.
  3. Sprinkle the flour over the caramelized onions and stir well. Cook for another 2 minutes.
  4. Slowly pour in the beef broth while stirring continuously to avoid lumps. Add the thyme and bay leaves, season with salt and pepper, and simmer for 30 minutes.
  5. While the soup is simmering, preheat your oven to 200°C (392°F). Slice the baguette and toast the slices in the oven until golden and crispy.
  6. Ladle the hot soup into oven-safe bowls. Top each bowl with a few slices of toasted baguette and a generous amount of grated Gruyère cheese. Bake for about 5 minutes until the cheese is bubbly and golden.

Nutrition

Calories: 390kcalCarbohydrates: 30gProtein: 12gFat: 25gSaturated Fat: 15gPolyunsaturated Fat: 1gMonounsaturated Fat: 8gCholesterol: 70mgSodium: 800mgPotassium: 500mgFiber: 2gSugar: 5gVitamin A: 500IUVitamin C: 5mgCalcium: 250mgIron: 2mg

Notes

For an extra layer of flavor, consider adding a splash of red wine after caramelizing the onions. Store any leftover soup in the refrigerator for up to 3 days. Reheat gently, adding a splash of water if it thickens too much. For a healthier twist, use homemade beef broth and avoid rushing the caramelization of the onions for that sweet flavor.
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