Easy French Onion Soup

Step 1: Caramelize the Onions

1. Heat the butter and olive oil in a large pot over medium heat.
2. Add the sliced onions and cook, stirring frequently, for 10 minutes.
3. Sprinkle in the sugar (if using) and continue cooking for another 20-30 minutes, stirring occasionally, until the onions are golden brown and deeply caramelized. Adjust the heat as needed to prevent burning.

Step 2: Build the Soup Base

1. Stir in the minced garlic and cook for 1-2 minutes until fragrant.
2. Deglaze the pot by adding the white wine, scraping up any browned bits from the bottom of the pot. Simmer until the wine is reduced by half.
3. Add the beef broth, thyme, bay leaf, salt, and pepper. Bring the soup to a boil, then reduce the heat and let it simmer for 15-20 minutes.
4. Remove the thyme sprigs and bay leaf before serving.

Step 3: Prepare the Topping

1. Preheat your oven broiler.
2. Place the baguette slices on a baking sheet and toast under the broiler for 1-2 minutes on each side until lightly golden.
3. Sprinkle the grated Gruyère and Parmesan cheeses generously over each slice. Return to the broiler for another 1-2 minutes, or until the cheese is bubbly and golden.

Step 4: Serve the Soup

1. Ladle the hot soup into oven-safe bowls (if you have them).
2. Top each bowl with the cheesy bread slices. If using oven-safe bowls, you can place them under the broiler for 1-2 minutes to melt the cheese further.
3. Garnish with additional thyme or a sprinkle of black pepper, if desired.

Tips for Success

• Be Patient with the Onions: Caramelizing onions takes time but is essential for the soup’s deep flavor.
• Choose the Right Cheese: Gruyère melts beautifully and provides a nutty richness, but Swiss or mozzarella can work in a pinch.
• Layer the Flavors: A splash of balsamic vinegar can be added for extra depth if you’re skipping the wine.

Variations to Try

• Vegetarian Version: Substitute vegetable broth for beef broth.
• Mushroom Twist: Add sautéed mushrooms for an earthy flavor.
• Spicy Kick: Sprinkle red pepper flakes for a hint of heat.

Why This Recipe Works

This Easy French Onion Soup captures all the indulgent flavors of the traditional dish without being overly complicated. The caramelized onions, combined with the savory broth and gooey cheese, create a luxurious and satisfying bowl of soup perfect for any occasion.