French Onion Soup (Soupe à l'Oignon)

By Sam

French · Soups

French Onion Soup (Soupe à l'Oignon) recipe, French, Soups

Rich French onion soup topped with toasted baguette and melted bubbly Gruyère cheese.

50 min
Total Time
4
Servings
Medium
Difficulty
Jul 28, 2026
Updated

One serving of French Onion Soup (Soupe à l'Oignon) has about 480 calories, 12g protein, 25g carbs and 34g fat, and takes about 50 minutes to make. Get the full nutrition breakdown with Rasora AI.

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Nutrition

480kcal
Calories
Fits under 500 cal →
12g
Protein
25g
Carbs
34g
Fat

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Ingredients

  • 4 large yellow onion
  • 3 tbsp butter
  • 1 tbsp flour
  • 0.5 cup dry white wine
  • 4 cup beef broth
  • 4 slice baguette
  • 1.5 cup gruyère cheese

Instructions

  1. 01

    Melt butter in a pot, cook sliced onions on low heat for 35 mins until deep golden caramelized.

  2. 02

    Stir in flour for 1 min, pour in white wine to deglaze.

  3. 03

    Add beef broth, simmer for 15 mins.

  4. 04

    Ladle hot soup into oven-safe bowls.

  5. 05

    Top with baguette slice and shredded Gruyère, broil for 3-4 mins until cheese is bubbly and browned.

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French Onion Soup (Soupe à l'Oignon)