A rich, savory broth made from slow-caramelized onions, beef stock, and often fortified with wine or brandy, then topped with melted Gruyère cheese. The traditional bread crouton is omitted for a keto version.

Key ingredients

Onions (yellow), beef stock, Gruyère cheese, butter, dry white wine or brandy (optional), garlic, thyme, salt, pepper.

If you order it anyway

Crucially, request *no bread* or croutons whatsoever. Confirm with the server that no flour or sugar is added to the broth as a thickener or sweetener. If possible, ask for extra cheese.

If you order it anyway, say this (French)

Pour la Soupe à l'oignon, pas de pain ni croûtons, s'il vous plaît. Pourriez-vous confirmer qu'il n'y a pas de farine ou de sucre dans le bouillon? Puis-je avoir un supplément de fromage?

For the Soupe à l'oignon, no bread or croutons. Please confirm no flour or sugar in the broth. Could I have extra cheese?

Watch out for

Onions are relatively high in carbs once caramelized. Wine/brandy reduction contributes carbs. Potential flour used for thickening the broth (roux). Hidden sugars in commercial beef stocks.

Macros are estimates for a typical serving and vary by restaurant. Confirm ingredients with staff, especially if you have allergies. Our ingredient lists are generated automatically and describe how a dish is typically made.