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French Onion Soup

Caramelized onions simmered in beef stock and white wine, ladled into ovenproof casseroles, topped with French bread and Gruyère, and broiled until the cheese melts and browns.

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One of 2 versions of French Onion Soup
Illustration of French Onion Soup
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Ingredients

  • 3 tbsp unsalted butter
  • 3 to 4 large red or yellow onions, about 3 lb, peeled and thinly sliced
  • 3/4 tsp kosher salt, more to taste
  • 2 qt beef stock, 8 cups
  • 1 cup dry white wine
  • 1 tbsp dry sherry
  • 1 tbsp all-purpose flour
  • 1/2 tsp black pepper, more to taste
  • 8 to 12 French bread, cut into 1/2-inch slices
  • 1 1/2 cups grated Gruyère cheese

Steps

1Caramelize the onions

  1. Melt 3 tbsp unsalted butter in a heavy Dutch oven over medium heat.
  2. Add 3 to 4 large red or yellow onions, peeled and thinly sliced.
  3. Add 1/2 tsp kosher salt.
  4. Stir to combine.
  5. Cover and let the onions soften for 5 minutes.
  6. Remove the lid and let the onions caramelize over medium heat, stirring occasionally, until golden brown, 45 to 60 minutes.
  7. Adjust the heat if the onions are browning too quickly.

2Meanwhile, warm the broth

  1. Warm 2 qt beef stock in a saucepan over low heat.

3Build the soup

  1. Add 1 cup dry white wine to the pot.
  2. Add 1 tbsp dry sherry.
  3. Allow the mixture to come to a boil.
  4. Stir in 1 tbsp all-purpose flour.
  5. Let the mixture thicken for a minute or two.
  6. Slowly add the warm 2 qt beef stock to the onion mixture.
  7. Add 1/4 tsp kosher salt.
  8. Add 1/2 tsp black pepper.
  9. Boil uncovered for 10 minutes.
  10. Add more salt to taste.
  11. Add more pepper to taste.

4Broil and serve

  1. Heat the broiler.
  2. Arrange individual ovenproof casseroles on a baking sheet.
  3. Ladle the soup into the casseroles.
  4. Cover the top with 8 to 12 French bread slices.
  5. Sprinkle each casserole generously with 1 1/2 cups grated Gruyère cheese.
  6. Broil for a minute or two, watching carefully, until the cheese melts and browns.
  7. Serve immediately.

French Onion Soup: 2 versions

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    French Onion Soup
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