Description
This Easy French Onion Soup recipe delivers a classic, rich, and hearty comfort dish featuring caramelized onions, savory beef broth, and topped with toasted baguette slices smothered in melted Gruyère cheese. Perfect for dinner on a chilly day, the soup combines deep onion flavor with a cheesy crust for a timeless French favorite.
Ingredients
Scale
Soup Ingredients
- 4 large onions, thinly sliced
- 2 tablespoons butter
- 4 cups beef broth
- 1 teaspoon thyme
- 1 tablespoon flour
- Salt and pepper to taste
Topping
- 4 slices baguette
- 1 cup Gruyère cheese, shredded
Instructions
- Caramelize Onions: In a large pot, melt the butter over medium heat. Add the thinly sliced onions and cook, stirring occasionally, until they become golden brown and caramelized, approximately 25 minutes. This slow caramelization develops the deep, sweet flavor key to the soup.
- Create Roux: Sprinkle the flour over the caramelized onions and stir well to combine. Cook this mixture for an additional 2 minutes to form a slight roux which will help thicken the soup.
- Add Broth and Herbs: Pour in the beef broth and add the teaspoon of thyme. Bring the soup to a boil, then immediately reduce the heat to a simmer. Let it cook gently for 15 minutes, allowing the flavors to meld and the soup to thicken slightly.
- Season Soup: Taste the soup and season with salt and pepper according to your preference. Stir well to distribute the seasoning evenly.
- Toast Baguette Slices: While the soup simmers, place the baguette slices in the oven and toast until golden and crispy. This usually takes 5–7 minutes at 350°F (175°C). Once toasted, sprinkle shredded Gruyère cheese over each slice to melt slightly.
- Serve: Ladle the hot soup into bowls and top each serving with a cheese-covered toasted baguette slice. Serve immediately to enjoy the contrast of the warm soup and crispy cheesy topping.
Notes
- Caramelizing onions is key to the depth of flavor; do not rush this step as proper browning takes time.
- For a vegetarian version, substitute beef broth with vegetable broth and use a vegetarian cheese option.
- Gruyère cheese provides the traditional nutty, creamy topping; substitute with Swiss cheese if unavailable.
- To make the soup gluten-free, replace flour with a gluten-free thickener or omit it and allow longer simmering to thicken naturally.
- Use fresh thyme for best flavor, but dried thyme is an acceptable alternative in this recipe.
