Dutch Oven French Onion Soup (Print view)

Caramelized onions in savory broth with crusty bread and melted Gruyère

# List of Ingredients:

→ 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)

# Step-by-Step Directions:

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 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 the 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 - Serve immediately, garnished with fresh thyme if desired.

# Expert Suggestions:

01 -
  • It's a total mood lifter: The caramelized onions taste so rich and complex that nobody believes you didn't spend hours on this.
  • Your Dutch oven becomes your best friend: Everything happens in one vessel, so cleanup is refreshingly simple.
  • It feels like restaurant-quality comfort: Broiling the cheese bowls gives you that dramatic, bubbling finish that makes serving this dish feel like an occasion.
02 -
  • Don't rush the caramelization: This is where the entire soul of the soup lives—those 40–45 minutes aren't wasted time, they're when the onions develop their complex, sweet depth that makes this dish taste like you've been tending it all day.
  • The Worcestershire sauce is a game-changer: I once made this without it and the soup fell flat; that one tablespoon adds umami richness that transforms good soup into unforgettable soup.
  • Oven-safe bowls are essential: Ceramic or metal bowls designed for broiling prevent cracking and ensure even heat so the cheese browns beautifully.
03 -
  • Make the soup a day ahead: The flavors deepen overnight, and you can reheat it gently before broiling the cheese topping, which saves you time on serving day.
  • Keep extra baguette slices toasted and stored: You can make these ahead and store them in an airtight container; they stay crispy and you can assemble the bowls faster.
  • Use a wooden spoon for deglazing: It scrapes up the browned bits better than a whisk and gives you more control over the flavor development.
Go Back