french · Restaurant bowl

How many calories in a bowl of french onion soup?

About 400 kcal for a typical restaurant bowl.

The calories come primarily from the broth, melted Gruyère cheese, and the buttery crostini topping. The combination of rich stock and high-fat cheese creates a dense, calorie-heavy dish.

What each part adds

PartPortionCaloriesProteinCarbsFat
Beef broth1 cup, 240 g35 kcal6 g2 g1 g
Caramelized onions1/2 cup, 75 g35 kcal1 g8 g0 g
Gruyère cheese1/2 cup, 50 g200 kcal13 g0 g16 g
Buttered baguette slice1 slice, 30 g130 kcal3 g20 g4 g
Whole plate1 serving, 395 g400 kcal23 g30 g21 g

Estimates for a typical portion. Your plate will differ with portion size and how it is cooked. Not medical advice.

Swaps that change the number

Cook it lighter · from Thyme, our cookbook appHomemade french onion soupTopped with toast and parmesan, made from scratch. Free recipe in the Thyme cookbook.
Open the recipe in Thyme