French Onion Soup Recipe

inspired by

@lamadeleine

Dec 26 2025

•

1h 30m

•

Serves 6

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Recipe information

Make French Onion Soup in just 1h 30m. A classic French onion soup topped with melted cheese.

Preparing the Soup

1. Prepare Onions

Slice the yellow onions thinly. Aim for even slices to ensure uniform cooking.

2. Melt Butter and Oil

In a large pot, heat the butter and olive oil over medium heat until melted.

3. Caramelize Onions

Add the sliced onions to the pot. Cook, stirring frequently, for about 25-30 minutes until they are caramelized and golden brown.

4. Add Garlic

Add the minced garlic and sauté for 1-2 minutes until fragrant.

5. Deglaze with Wine

Pour in the dry white wine, scraping the bottom of the pot to deglaze. Let it simmer for about 5 minutes until reduced by half.

6. Combine Ingredients

Add the beef broth, thyme, bay leaf, salt, and black pepper. Bring to a simmer.

7. Simmer Soup

Let the soup simmer for 30 minutes, allowing the flavors to meld together.

Preparing the Toppings

8. Preheat Oven

While the soup is simmering, preheat your oven to 350°F (175°C).

9. Prepare Baguette

Slice the French baguette into 1-inch thick slices. Place them on a baking sheet.

10. Toast Baguette

Toast the baguette slices in the preheated oven for about 10 minutes until golden and crispy.

Serving the Soup

11. Remove Bay Leaf

Remove the bay leaf from the soup before serving.

12. Ladle Soup

Ladle the soup into oven-safe bowls. Top each bowl with a slice of toasted baguette.

13. Add Cheese

Sprinkle the shredded Gruyère and grated Parmesan cheese generously over the top of the bread.

14. Broil Soup

Place the bowls on a baking sheet and broil in the oven for 3-5 minutes, or until the cheese is melted and bubbly.

15. Serve Soup

Serve immediately, garnished with additional thyme if desired.