French Onion Soup

French Onion Soup is a classic French bistro dish, traditionally made with caramelized onions slowly simmered in beef broth and often topped with a crusty baguette slice and melted Gruyère cheese. Its rich, savory flavor comes from the deep, sweet caramelization of the onions, a process that can take over an hour to perfect. It is a staple of French cuisine, known for its comforting and hearty nature.

🍳 View the full French Onion Soup recipe →

🍽️ Nutrition at a glance

This soup is generally high in fat, primarily from the butter used to caramelize the onions and the generous cheese topping. It provides a good source of protein from the beef broth and cheese, along with some fiber from the onions, and typically contains around 400-600 calories per serving.

Nutrition breakdown

Calories	310 kcal
Protein	12 g
Carbs	28 g
Fat	16 g
Fiber	2 g
Sugar	6 g
Sodium	1200 mg
Calcium	250 mg
Iron	2 mg
Potassium	350 mg
Vitamin A	150 mcg
Vitamin C	4 mg
Vitamin B6	0.3 mg
Folate	40 mcg
Phosphorus	180 mg

Per 1 cup (240 g) · estimated, varies by recipe

💡 What's interesting

The deep, sweet flavor of French Onion Soup is a result of the Maillard reaction, a chemical process that browns and caramelizes the onions, creating complex flavors. It is also a dish that exemplifies the French culinary philosophy of transforming humble ingredients, like onions, into something elegant and deeply satisfying.