French Onion Au Gratin Recipe

Cooking Instructions

1. 1

   Caramelize the Onions

   In a large pot or Dutch oven, melt the butter over medium heat. Add the sliced onions and cook, stirring frequently, until they are caramelized and golden brown, about 30-40 minutes.

2. 2

   Add Broth and Wine

   Once the onions are caramelized, add the beef broth, dry white wine, bay leaves, and thyme. Bring to a boil, then reduce heat and let simmer for about 20 minutes. Season with salt and black pepper to taste.

3. 3

   Prepare the Bread

   While the soup simmers, preheat your broiler. Place the baguette slices on a baking sheet and toast them under the broiler until golden brown, about 2-3 minutes on each side.

4. 4

   Assemble the Gratin

   Remove the bay leaves from the soup. Ladle the soup into oven-safe bowls, place a toasted baguette slice on top of each bowl, and sprinkle generously with provolone and Gruyère cheese.

5. 5

   Broil and Serve

   Place the bowls under the broiler until the cheese is bubbly and golden brown, about 3-5 minutes. Serve hot and enjoy!