French Onion Soup
A classic French Onion Soup recipe with caramelized onions, rich beef broth, crispy baguette slices, and melted Gruyère cheese, delivering deep flavors and comforting warmth.
Prep Time 15 minutes mins
Cook Time 1 hour hr
Total Time 1 hour hr 15 minutes mins
Course Appetizer, Main Course
Cuisine French
Servings 4 servings
Calories 400 kcal
Large Pot or Dutch Oven
Oven-safe soup bowls
- 4 large yellow onions about 1.5 lbs (700 g), thinly sliced
- 3 tbsp (45 ml) olive oil
- 2 tbsp (30 g) unsalted butter
- 1 tbsp (12 g) sugar
- 2 cloves garlic minced (10 g)
- 1 tsp fresh thyme
- 4 cups (950 ml) beef broth
- 1 cup (240 ml) dry white wine
- 1 bay leaf
- Salt and black pepper to taste
- Several slices of baguette
- 1 cup (120 g) grated Gruyère cheese
Heat olive oil in a large pot over medium heat. Add sliced onions and a pinch of salt. Cook for 10 minutes until softened. Add butter and sugar, then cook for an additional 15–20 minutes, stirring frequently, until onions are deeply caramelized.
Stir in minced garlic and cook for 1 minute. Pour in white wine, scrape the pot, and simmer for 5 minutes until the wine reduces.
Add beef broth, thyme, and bay leaf. Season with salt and pepper. Reduce heat and simmer for 20–30 minutes, stirring occasionally.
While the soup simmers, toast several slices of baguette until golden and crispy. Optionally, rub with garlic.
Ladle the soup into oven-safe bowls, place toasted baguette slices on top, and cover with grated Gruyère cheese. Broil for 3–5 minutes until the cheese is melted and golden.
Garnish with fresh thyme if desired and serve immediately.
Caramelize the onions slowly to develop their natural sweetness.
Use high-quality beef broth for the best flavor.
Keep an eye on the soup under the broiler to prevent burning.
Keyword Caramelized Onions, Classic French Soup, French Onion Soup, Gruyère Cheese, Homemade Soup, Italian comfort food