Classic French Onion Soup

User Reviews

5

36 reviews
Excellent
  • Prep Time

    15 mins

  • Cook Time

    1 hr

  • Total Time

    1 hr 15 mins

  • Servings

    4 bowls

  • Calories

    425 kcal

  • Course

    Soup

  • Cuisine

    French

Classic French Onion Soup

Classic French Onion Soup features slowly caramelized yellow onions simmered in beef broth with thyme and optionally sherry, creating a rich and deeply flavored broth. Served topped with toasted baguette slices and melted gruyere and Parmesan cheeses, it offers a comforting blend of sweet onions, savory broth, and golden, cheesy bread that makes the soup hearty and satisfying.

Description

Classic French Onion Soup begins with yellow onions thinly sliced and cooked slowly with olive oil and butter until they are golden brown and caramelized, developing a natural sweetness and rich flavor. Minced garlic is added briefly to enhance the aromatic profile. The caramelized onions are then simmered in beef broth seasoned with dried thyme, salt, and pepper, with optional dry sherry to add depth and subtle acidity. This simmering melds flavors into a savory, hearty broth base.

For serving, baguette slices are brushed with olive oil and toasted under a broiler until crisp and golden. These toasts are then topped with slices of gruyere or provolone cheese and grated Parmesan and broiled again to melt and brown the cheese, producing a luscious crusted topping. The soup is ladled into oven-safe bowls, topped with the cheesy toasts, and broiled briefly to meld the components together.

This soup is warm and richly flavored with a balance of sweet caramelized onion, robust broth, and indulgent melted cheese. It is well suited as a starter or light meal during cool weather. If oven-safe bowls are unavailable, cheese can be melted on the bread separately, then added to the soup before serving for a variation on the presentation.

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Ingredients

Servings
  • 2 tablespoons olive oil
  • 6 medium yellow onion sliced
  • 2 tablespoons butter
  • 1 tablespoon garlic minced
  • 8 cups beef broth
  • 1/4 cup dry sherry optional
  • 1 teaspoon thyme dried
  • 1 teaspoon salt or to taste
  • 1/2 teaspoon black pepper or to taste

Soup Topping

  • 8 lices baguette French
  • 2 tablespoons olive oil
  • 4 lices gruyere cheese or provolone
  • 2 tablespoons Parmesan Cheese grated

Instructions

  1. Heat 2 tablespoons olive oil in a large pot over medium-high heat. Add the sliced onions and cook, stirring occasionally, until tender, about 5 to 7 minutes. Reduce heat to medium-low and continue to cook the onions, stirring every 3 to 5 minutes, until caramelized and golden brown, about 15 to 25 minutes.
  2. Stir in 2 tablespoons butter and 1 tablespoon minced garlic. Cook for 2 minutes, or until the butter melts and the garlic becomes fragrant.
  3. Pour in 8 cups beef broth and 1/4 cup dry sherry (if using). Season with 1 teaspoon dried thyme, 1 teaspoon salt, and 1/2 teaspoon black pepper. Bring the soup to a simmer, then reduce heat to medium-low and simmer for 20 to 30 minutes.
  4. While the soup is simmering, preheat the broiler setting on your oven, placing a rack 8 inches from the heating element. Brush both sides of the baguette slices with olive oil. Arrange the slices on a baking sheet and broil for 2 to 3 minutes on each side, or until golden brown. Watch closely to prevent burning.
  5. Preheat your broiler again if necessary. Place 4 oven-safe bowls onto a baking sheet and ladle the soup into each bowl. Place 2 slices of toasted baguette on top of each serving. Add 1 slice Gruyère and 1/2 tablespoon grated Parmesan to each bowl.
  6. Carefully slide the baking sheet with the soup bowls under the broiler. Broil until the cheese is bubbling and starting to brown, about 2 to 3 minutes. Watch carefully, as broiler times may vary.
  7. Serve the soup immediately, while the cheese is still melted and bubbly.

Notes

  • If you don't have oven-safe bowls, melt the cheese directly on the toasted baguette slices under the broiler, then add the cheesy toasts to the soup in regular bowls before serving.

Nutrition Information

Show Details
Serving 2cups Calories 425kcal (21%) Carbohydrates 19g (6%) Protein 17g (34%) Fat 31g (48%) Saturated Fat 12g (60%) Cholesterol 48mg (16%) Sodium 2567mg (107%) Potassium 533mg (11%) Fiber 3g (12%) Sugar 7g (14%) Vitamin A 462IU (9%) Vitamin C 13mg (14%) Calcium 386mg (39%) Iron 2mg (11%)

Nutrition Facts

Serving: 4bowls

Amount Per Serving

Calories 425 kcal

% Daily Value*

Serving 2cups
Calories 425kcal 21%
Carbohydrates 19g 6%
Protein 17g 34%
Fat 31g 48%
Saturated Fat 12g 60%
Cholesterol 48mg 16%
Sodium 2567mg 107%
Potassium 533mg 11%
Fiber 3g 12%
Sugar 7g 14%
Vitamin A 462IU 9%
Vitamin C 13mg 14%
Calcium 386mg 39%
Iron 2mg 11%

* Percent Daily Values are based on a 2,000 calorie diet.

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Overall Rating

5

36 reviews
Excellent

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