Dutch Oven French Onion Soup (Printable)

Caramelized onions in savory broth, topped with toasted baguette and melted Gruyère for ultimate comfort.

# Ingredient List:

→ Onions

01 - 5 large yellow onions, thinly sliced

→ Aromatics

02 - 3 tablespoons unsalted butter
03 - 2 tablespoons olive oil
04 - 2 garlic cloves, minced
05 - 1 teaspoon sugar

→ Broth & Flavorings

06 - 8 cups beef broth or vegetable broth for vegetarian option
07 - 1/2 cup dry white wine
08 - 2 teaspoons fresh thyme leaves or 1 teaspoon dried thyme
09 - 2 bay leaves
10 - 1 tablespoon Worcestershire sauce
11 - Salt and freshly ground black pepper to taste

→ Topping

12 - 1 baguette, sliced into 1/2-inch thick rounds
13 - 2 cups Gruyère cheese, grated
14 - 1/2 cup Parmesan cheese, grated, optional

# How-to Steps:

01 - In a large Dutch oven over medium heat, melt the butter with olive oil. Add the sliced onions and sugar. Cook, stirring frequently, until onions are very soft and deeply caramelized, approximately 40 to 45 minutes.
02 - Add the minced garlic and cook for 1 minute until fragrant.
03 - Pour in the dry white wine, scraping up any browned bits from the bottom of the pot. Simmer for 2 to 3 minutes until slightly reduced.
04 - Add the broth, thyme, bay leaves, and Worcestershire sauce. Bring to a simmer, reduce heat, and cook uncovered for 20 to 30 minutes. Season with salt and pepper to taste. Remove and discard bay leaves.
05 - While soup simmers, preheat oven broiler. Arrange baguette slices on a baking sheet and toast under the broiler until golden, approximately 1 to 2 minutes per side.
06 - Ladle soup into oven-safe bowls. Top each with a toasted baguette slice and a generous handful of Gruyère cheese, and Parmesan if using.
07 - Place bowls on a baking sheet and broil until cheese is melted and bubbling, 2 to 4 minutes.
08 - Remove from broiler and serve immediately, garnished with extra thyme if desired.

# Expert Hints:

01 -
  • It's impossibly forgiving—the Dutch oven's heavy bottom practically guarantees perfectly caramelized onions without fussy monitoring.
  • One pot means minimal cleanup, which matters more than you'd think when comfort food is calling.
  • The moment cheese melts and bubbles under the broiler feels like a small kitchen victory every single time.
02 -
  • Caramelization cannot be rushed—medium heat and patience create sweetness that high heat never will, no matter how long you cook.
  • Worcestershire sauce might seem optional but it's actually the ingredient that makes people say your soup tastes restaurant quality.
03 -
  • Make this soup a day ahead and reheat it gently—flavors deepen overnight and you'll only toast bread and add cheese when serving.
  • A splash of sherry in place of white wine creates deeper, more complex flavor that feels impossibly fancy for minimal extra effort.
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