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Samantha Denton

French Onion Soup

a classic onion soup with caramelized onions, beef broth, and cheese-tinished topping.

Ingredients

ingredients

  • 4 large yellow onions
  • 3 Tbsp butter
  • 1 Tbsp beef tallow or olive oil
  • 1 tsp salt (to start, adjust later)
  • 1/2 tsp sugar (optional, helps caramelization)
  • 3 garlic (cloves, minced)
  • 2 Tbsp flour
  • 1/2 cup sherry
  • 6 cups beef broth
  • 1 Tbsp soy sauce
  • 1–2 Tbsp Worcestershire sauce
  • 1 tsp fresh thyme (or 1/2 tsp dried)
  • 1 bay leaf
  • freshly ground black pepper (to taste)

for serving

  • slice baguette slices, toasted
  • Gruyère cheese
  • Mozzarella

Method

  1. 1

    Melt butter and beef tallow in a large, heavy pot over medium-low heat.

  2. 2

    Add onions and salt. Cook 40–50 minutes, stirring often, until deeply golden and jammy.

  3. 3

    Add garlic and cook 30 seconds until fragrant.

  4. 4

    Stir in flour and cook for 1 minute.

  5. 5

    Deglaze with sherry, scraping the bottom of the pot. Simmer until reduced by about half.

  6. 6

    Add broth, thyme, bay leaf, pepper, soy sauce, and Worcestershire.

  7. 7

    Bring to a gentle simmer and cook 20–30 minutes.

  8. 8

    Remove bay leaf and thyme sprigs. Taste and adjust seasoning.

  9. 9

    Ladle soup into oven-safe bowls. Top with toasted baguette and a generous amount of Gruyère and mozzarella.

  10. 10

    Broil 2–4 minutes until bubbly and deeply golden.