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French Onion Soup

A classic French dish featuring sweet caramelized onions in a savory broth, topped with crunchy bread and melted cheese.
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Prep Time 30 minutes
Cook Time 1 hour
Total Time 1 hour 30 minutes
Servings: 4 servings
Course: Appetizer, Soup
Cuisine: French
Calories: 350
Ingredients Method Notes

Ingredients
  

Main Ingredients
  • 4 large onions, thinly sliced
  • 4 tablespoons unsalted butter
  • 2 tablespoons olive oil
  • 2 cloves garlic, minced
  • 1 teaspoon sugar
  • 1 tablespoon flour
  • 6 cups beef or vegetable broth
  • 1 cup dry white bread, cut into cubes (or baguette slices)
  • 1.5 cups grated Gruyère cheese (or Swiss cheese)
  • Salt and pepper to taste
  • Fresh thyme for garnish (optional)

Method
 

Preparation
  1. In a large pot, melt the butter together with olive oil over medium heat.
  2. Add the sliced onions and sprinkle with sugar. Cook, stirring occasionally, until they turn golden brown and caramelized, about 30-40 minutes.
  3. Once the onions are caramelized, add the minced garlic and cook for an additional 2-3 minutes until fragrant.
  4. Sprinkle in the flour and stir for 1-2 minutes, allowing it to bind to the onions.
  5. Slowly add in the broth while stirring to deglaze the pot, scraping any bits off the bottom.
  6. Bring the soup to a gentle simmer. Season with salt and pepper to taste. Let it simmer for about 20 minutes.
  7. While the soup simmers, preheat your oven to 375°F (190°C). Place the bread cubes or slices on a baking sheet and toast them until golden brown.
  8. In an oven-safe bowl, ladle the soup and top with toasted bread and grated cheese.
  9. Place under the broiler until the cheese is bubbly and golden, generally 3-5 minutes. Keep a close eye to prevent burning.
  10. Garnish with fresh thyme if desired, and serve immediately while hot.

Notes

To ensure your French Onion Soup turns out perfectly every time, be patient with caramelizing the onions. Experiment with different cheeses and herbs for unique flavors. Store leftovers in an airtight container in the refrigerator for 3-4 days.