Easy Homemade French Onion Soup
A warm and comforting soup featuring sweet caramelized onions, beef broth, and toasty bread topped with melted Gruyère cheese. This simple yet delicious dish is perfect for busy weeknights or family gatherings.
Ingredients
- 4 large yellow onions thinly sliced
- 4 tablespoons unsalted butter
- 4 cups beef broth
- 1 tablespoon all-purpose flour
- 1 teaspoon sugar
- 1 teaspoon salt
- 1/2 teaspoon black pepper
- 1 tablespoon fresh thyme leaves or 1 teaspoon dried thyme
- 4 slices French bread
- 1 1/2 cups shredded Gruyère cheese
Instructions
- Prep the Onions: Start by slicing the onions thinly. The thinner the slices, the better they will caramelize.
- Caramelize the Onions: In a large pot, melt the butter over medium heat. Add in the sliced onions and sprinkle with salt. Cook, stirring occasionally, for about 25-30 minutes until the onions are deeply golden and caramelized.
- Add Flour and Sugar: Once the onions are done caramelizing, stir in the flour and sugar. This will give your soup a lovely thickness. Cook for an additional 2 minutes.
- Pour in Broth: Gradually add the beef broth while stirring. Bring the mixture to a simmer and add thyme, black pepper, and more salt if desired. Allow it to simmer for 15 minutes, letting the flavors meld.
- Toast the Bread: While the soup is simmering, preheat your oven to 400°F (200°C). Place French bread slices on a baking sheet and toast them for 5-7 minutes, until crispy.
- Assemble: Divide the soup into oven-safe bowls. Place a piece of the toasted French bread on top of each bowl and layer generously with shredded Gruyère cheese.
- Broil: Carefully place the bowls under the broiler for about 2-3 minutes until the cheese is beautifully melted and bubbly. Watch closely to avoid burning!
- Serve & Enjoy: Let the soup cool for a moment before serving, and enjoy every savory bite!