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Classic Easy French Onion Soup

Close-up of a bowl of rich french onion soup topped with a thick slice of bread and bubbly, melted Gruyère cheese.
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Make a rich and savory French Onion Soup featuring deeply caramelized onions and a gooey Gruyère cheese topping.

Ingredients

Scale
  • 2 tablespoons butter
  • 1 tablespoon olive oil
  • 3 pounds yellow onions, thinly sliced
  • 1 teaspoon salt, plus more to taste
  • 1/2 teaspoon sugar
  • 2 cloves garlic, minced
  • 1/2 cup dry sherry or dry white wine
  • 6 cups beef broth, low sodium
  • 1 bay leaf
  • 1/4 cup all-purpose flour
  • 1 teaspoon fresh thyme leaves
  • Freshly ground black pepper to taste
  • 4 thick slices baguette, toasted
  • 8 ounces Gruyère cheese, grated

Instructions

  1. Melt butter and olive oil in a large Dutch oven over medium heat. Add the sliced onions, salt, and sugar. Cook slowly, stirring occasionally, for 30 to 40 minutes until the onions are deep golden brown and fully caramelized. Do not rush this step.
  2. Add the minced garlic and cook for 1 minute until fragrant.
  3. Pour in the sherry or wine, scraping up any browned bits from the bottom of the pot. Cook until the liquid has mostly evaporated, about 3 minutes.
  4. Sprinkle the flour over the onions and stir well. Cook for 2 minutes.
  5. Pour in the beef broth and add the bay leaf and thyme. Bring the soup to a simmer, then reduce the heat to low, cover partially, and cook for 20 minutes to allow flavors to meld. Remove the bay leaf and season with pepper and additional salt if needed.
  6. Preheat your broiler. Ladle the soup into oven-safe bowls. Place one toasted baguette slice on top of the soup in each bowl.
  7. Generously cover the bread with grated Gruyère cheese.
  8. Place the bowls on a baking sheet and broil for 2 to 4 minutes, watching closely, until the cheese is melted, bubbly, and golden brown. Serve immediately.

Notes

  • For the deepest flavor, use high-quality beef broth.
  • If you do not have oven-safe bowls, you can melt the cheese on the bread separately on a baking sheet and then float the cheesy crouton on top of the soup just before serving.

Nutrition

Find it online: https://sundayflavor.com/classic-easy-french-onion-soup-recipe/