French Onion Soup with Truffle Oil

A luxurious twist on traditional French Onion Soup with a hint of truffle oil. This recipe is perfect for a gourmet experience at home, featuring caramelized onions, rich beef broth, and a cheesy crouton topping. Perfect for cold days, comforting dinner parties, and those seeking a taste of French elegance.
Prep time: 10 minutes
Cook time: 1 hour
Serves: 6

Ingredients

2 lbs yellow onions, thinly sliced
4 tbsp unsalted butter
1 tbsp olive oil
1 tsp salt
1/2 tsp sugar
3 tbsp all-purpose flour
8 cups beef broth
1/2 cup dry white wine
1 bay leaf
1 tsp fresh thyme leaves
3/4 cup Gruyère cheese, grated
1/2 cup Mozzarella cheese, grated
1 tbsp truffle oil
1 baguette, sliced into 1-inch rounds
Salt and pepper to taste

Instructions

1. In a large pot, melt butter with olive oil over medium heat. Add sliced onions, salt, and sugar. Cook, stirring often, for about 25 minutes until onions are deeply caramelized and golden brown.
2. Sprinkle flour over the onions and stir for 1-2 minutes.
3. Gradually add beef broth and white wine, stirring to combine. Add bay leaf and thyme. Bring to a simmer and cook for about 30 minutes, stirring occasionally.
4. Season with salt and pepper to taste. Remove bay leaf and discard.
5. Preheat the broiler. Place baguette slices on a baking sheet and toast in the oven until golden.
6. Ladle soup into oven-safe bowls. Top each with toasted baguette slices, sprinkle with Gruyère and Mozzarella cheeses.
7. Place bowls on a baking sheet, broil in the oven until cheese is melted and bubbly, about 3-5 minutes.
8. Drizzle with truffle oil before serving.

Storage

Refrigerate in an airtight container for up to 3 days.

Reheating

Reheat gently on the stovetop over medium heat until warm. Alternatively, microwave in a covered dish until heated through.

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This recipe is for informational purposes only. Always follow proper food safety practices, cook foods to safe internal temperatures, and store leftovers appropriately. Results may vary.