Dutch Oven French Onion Soup (Printable Version)

Rich, caramelized onion soup topped with toasted bread and melted cheese for ultimate comfort.

# Components:

→ 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)

# 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 and fully incorporated into the caramelized onions.
03 - Pour in the dry white wine, scraping up any browned bits from the bottom of the Dutch oven. Simmer for 2 to 3 minutes until the wine is slightly reduced.
04 - Add the broth, thyme, bay leaves, and Worcestershire sauce. Bring to a simmer, reduce heat to low, and cook uncovered for 20 to 30 minutes. Season with salt and pepper to taste. Remove and discard bay leaves.
05 - While the soup simmers, preheat your oven broiler. Arrange baguette slices on a baking sheet and toast under the broiler until golden brown, approximately 1 to 2 minutes per side.
06 - Ladle the hot soup into oven-safe bowls. Top each bowl with a toasted baguette slice and a generous handful of grated Gruyère cheese, and Parmesan cheese if desired.
07 - Place filled bowls on a baking sheet and broil under the preheated broiler until the cheese is melted and bubbling, approximately 2 to 4 minutes.
08 - Remove from broiler and serve immediately, garnished with fresh thyme leaves if desired.

# Expert Tips:

01 -
  • It looks fancy enough to impress dinner guests but actually gets easier the longer it simmers, which means you can relax while it cooks.
  • The transformation from plain onions to this rich, savory soup feels like kitchen magic, and honestly, it builds real confidence.
02 -
  • Don't rush the caramelization—cooking onions on high heat for 15 minutes gives you brown onions, not caramelized ones, and there's a world of difference in flavor.
  • Taste and season right before serving because the soup concentrates as it cooks and you don't want it to become overly salty.
03 -
  • Make the soup a day ahead and reheat it gently before assembling with cheese and bread—the flavors actually improve overnight and it saves you time when serving.
  • If your broiler tends to burn things quickly, tent the bowls loosely with foil and cook at a lower temperature for slightly longer instead of risking charred cheese.
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