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The Laziest Way to Make French Onion Soup Is Also the Smartest

The Laziest Way to Make French Onion Soup Is Also the Smartest

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This French Onion Soup delivers rich, savory flavors with minimal effort. By utilizing the oven for caramelizing onions, it offers a hands-off approach to a classic dish, crowned with melty Gruyère cheese and crusty bread.

Ingredients

Scale
  • 6 large yellow onions, halved and sliced 1/4-inch thick
  • 4 tablespoons unsalted butter
  • 1 teaspoon kosher salt
  • 1/2 cup dry white wine (optional)
  • 6 cups beef broth
  • 1 bay leaf
  • 2 sprigs fresh thyme
  • 1 baguette, sliced into 1-inch thick pieces
  • 2 cups shredded Gruyère cheese

Instructions

  1. Preheat Oven: Set your oven to 375°F (190°C).
  2. Prepare Onions: Place sliced onions in a Dutch oven with butter and salt. Toss to coat.
  3. Caramelize Onions: Cover and bake for 1 hour. Uncover, stir, and continue baking uncovered for another hour, stirring occasionally, until onions are deeply golden.
  4. Deglaze: Transfer pot to stovetop over medium heat. Add white wine, scraping up any browned bits, and simmer for 5 minutes.
  5. Simmer Soup: Add beef broth, bay leaf, and thyme. Bring to a boil, then reduce heat and simmer for 30 minutes. Remove bay leaf and thyme sprigs.
  6. Prepare Bread: While soup simmers, toast baguette slices until golden.
  7. Assemble and Broil: Ladle soup into oven-safe bowls. Top each with a toasted baguette slice and a generous amount of Gruyère. Place under broiler until cheese is bubbly and golden.

Notes

  • For a vegetarian version, substitute beef broth with vegetable broth and ensure cheese is vegetarian-friendly.
  • If you don’t have oven-safe bowls, melt cheese on bread slices separately and add to soup before serving.

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