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Instructions
- Caramelize the Onions: In a large pot, melt butter with olive oil over medium heat. Add sliced onions and cook, stirring occasionally, until golden brown and caramelized โ about 30โ40 minutes.
- Add Flavor: Stir in garlic, thyme, and the bay leaf. Cook for 1 minute until fragrant.
- Simmer the Soup: Pour in the beef broth, chicken broth, and wine (if using). Bring to a boil, then reduce the heat and simmer for 15โ20 minutes. Season with salt and pepper to taste.
- Prepare the Topping: Preheat the broiler. Ladle soup into oven-safe bowls, then top each with a toasted baguette slice and a generous handful of shredded Gruyรจre cheese.
- Broil and Serve: Place the bowls under the broiler until the cheese is melted, bubbly, and lightly browned โ about 2โ3 minutes. Carefully remove from the oven and let cool slightly before serving.
Tips for Perfect French Onion Soup