Description
French Onion Soup is a classic, soul-warming dish featuring slowly caramelized sweet onions simmered in rich beef or vegetable broth, topped with toasted baguette slices and melted Gruyère cheese. This comforting recipe blends deep, sweet, and savory flavors, perfect for chilly evenings or casual gatherings, and is easy to customize to suit various dietary preferences.
Ingredients
Scale
Onions and Cooking Fats
- 6 large sweet onions (yellow or Vidalia), thinly sliced
- 3 tablespoons butter
- 1 tablespoon olive oil
Broth and Liquids
- 6 cups beef broth (or vegetable broth for vegetarian version)
- 1/2 cup dry white wine or sherry
Herbs and Seasoning
- 2–3 sprigs fresh thyme
- Salt, to taste
- Freshly ground black pepper, to taste
Toppings
- 1 baguette, sliced and toasted
- 2 cups grated Gruyère cheese (or Swiss, mozzarella, or fontina as alternatives)
Instructions
- Caramelize the Onions: Slice the onions thinly and cook them slowly over low heat in a mixture of butter and olive oil. Stir frequently and allow the onions to turn a rich golden brown and develop a sweet flavor over 30 to 40 minutes, being careful not to burn them.
- Deglaze the Pan: Pour in the dry white wine or sherry, scraping the bottom of the pan to lift any browned bits. Let the liquid reduce slightly to concentrate the flavors.
- Add Broth and Herbs: Add the beef or vegetable broth along with fresh thyme sprigs. Season with salt and pepper. Simmer gently for 20 to 30 minutes to meld the flavors.
- Prepare the Bread and Cheese: Slice the baguette and toast the slices until crisp. Grate the Gruyère cheese and set aside.
- Assemble and Broil: Ladle the hot soup into oven-safe bowls. Place a toasted baguette slice on top of each bowl, then generously cover with grated Gruyère cheese. Place the bowls under a broiler for 3 to 5 minutes until the cheese bubbles and turns golden brown.
Notes
- Patience with onions is key—slow caramelization brings out deep, rich flavor.
- Use good-quality broth for a more flavorful soup.
- Do not skip deglazing; it adds essential depth by lifting stuck-on flavors.
- Watch the cheese carefully under the broiler to avoid burning.
- Serve immediately for best flavor and texture when cheese is perfectly melted.
- Prep Time: 15 minutes
- Cook Time: 70 minutes
- Category: Appetizers
- Method: Baking
- Cuisine: French
Nutrition
- Serving Size: 1 bowl (approx. 1.5 cups)
- Calories: 320
- Sugar: 9g
- Sodium: 900mg
- Fat: 15g
- Saturated Fat: 8g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 30g
- Fiber: 3g
- Protein: 14g
- Cholesterol: 45mg