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Best French Onion Soup Recipe with Gruyere Croutons

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A rich and comforting French onion soup with caramelized onions, savory broth, and gooey Gruyere croutons, perfect for cozy nights or entertaining guests.

Ingredients

Scale
  • 6 large yellow onions, thinly sliced
  • 4 tablespoons unsalted butter
  • 2 tablespoons olive oil
  • 8 cups beef stock (or a mix of beef and chicken stock)
  • 1/2 cup dry white wine (optional)
  • A few sprigs of fresh thyme (or 1 teaspoon dried thyme)
  • 2 bay leaves
  • Salt and black pepper, to taste
  • 2 cups Gruyere cheese, grated
  • 8 thick slices of baguette, toasted

Instructions

  1. Slice the onions thinly and grate the Gruyere cheese. Toast the baguette slices lightly and set aside.
  2. In a large soup pot or Dutch oven, melt the butter and olive oil over medium heat. Add the sliced onions and stir to coat. Cook for 25-30 minutes, stirring occasionally, until the onions are golden brown and caramelized.
  3. Pour in the white wine, scraping the bottom of the pot to deglaze. Let it simmer for 2-3 minutes. Add the beef stock, thyme, bay leaves, and season with salt and pepper. Bring to a boil, then reduce to a gentle simmer. Cover and let it cook for 20 minutes.
  4. Place the toasted baguette slices on a baking sheet. Top each slice generously with grated Gruyere cheese.
  5. Preheat your oven’s broiler and place the croutons under it for 2-3 minutes, or until the cheese is melted and bubbly.
  6. Ladle the hot soup into oven-safe bowls. Place a Gruyere crouton on top of each bowl and serve immediately.

Notes

[‘Caramelization is key—take your time to properly caramelize the onions.’, ‘Deglaze the pot with wine for extra flavor.’, ‘Use quality Gruyere cheese for the best results.’, ‘Toast the bread slightly to ensure it holds up in the soup.’, ‘Fresh thyme and bay leaves add depth to the soup.’]

Nutrition

Keywords: French onion soup, Gruyere croutons, caramelized onions, comfort food, soup recipe

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