Soupe à l'oignon (sup a lɔɲɔ̃)
Also known as
- Soupe à l'oignon gratinée — full name including cheese crust
Ingredients
onion, butter, beef broth, flour, french bread, gruyere cheese, thyme
Commonly hidden ingredients
beef broth, white wine, worcestershire sauce, sugar
Preparation note
Traditionally prepared with beef broth.