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Jeff Mauro’s French Onion Soup

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A classic French Onion Soup featuring caramelized onions, rich beef broth, and toasted baguette slices topped with melted Gruyère cheese, perfect for cold-weather comfort.

Ingredients

Scale
  • 4 tablespoons unsalted butter
  • 6 yellow onions (approximately 1 pound), sliced 1/4-inch thick
  • 1 teaspoon kosher salt, plus more as needed
  • 1 teaspoon sugar
  • 1/2 cup dry sherry
  • 8 cups beef broth
  • 6 fresh thyme sprigs, tied with butcher's twine
  • 1 bay leaf
  • Freshly ground black pepper
  • 1 baguette, sliced on the bias into 1/2-inch slices
  • Olive oil, for brushing
  • 8 slices Gruyère cheese

Instructions

  1. Heat a large Dutch oven over medium-high heat. Add the butter and onions and stir until the butter is melted.
  2. Add the salt and sugar, then cover the Dutch oven with a lid. Cook, stirring occasionally, until the onions are translucent and liquids have been released, about 20 minutes.
  3. Uncover, reduce the heat to medium and continue to cook until the onions are uniformly caramelized, 40 to 45 minutes. Deglaze with about 1/4 cup water and scrape with a wooden spoon when the onions get very dark and start sticking to the bottom of the pan; do this at least twice.
  4. Add the dry sherry and cook until mostly evaporated.
  5. Add the beef broth, thyme sprigs tied with butcher's twine, and bay leaf. Bring to a simmer and cook for 30 minutes. Season with freshly ground black pepper and additional salt if needed.
  6. Preheat the oven to 400 degrees F.
  7. Brush baguette slices with olive oil and toast in the oven until golden brown.
  8. Ladle soup into ovenproof crocks or bowls. Place toasted baguette slices on top of the soup and cover each with a slice of Gruyère cheese.
  9. Place crocks on a baking sheet and bake in the oven until the cheese is melted and bubbly, about 10 minutes.
  10. Serve hot.

Notes

Caramelizing the onions slowly is key to developing the soup’s deep flavor. Deglazing the pan with water prevents burning and adds richness. Use good quality beef broth and Gruyère cheese for the best taste.

Nutrition

Find it online: https://www.receipster.com/french-onion-soup/

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