Why go
A croque-monsieur is a straightforward French café-style meal when a full restaurant lunch is unnecessary. It centres on ham and cheese, while a croque-madame adds an egg. The browned bread and melted filling make it easy to recognise on a menu, and the egg variation helps distinguish the two common names.
The full story
The croque-monsieur is a grilled or baked sandwich made with bread, ham and cheese. Its name combines croquer, meaning to bite, with monsieur. The sandwich became a familiar fixture of French cafés and brasseries in the early 20th century. A croque-madame is the related version topped with a fried or poached egg. Both names remain useful menu vocabulary because the difference is small but clear: the croque-monsieur is the basic hot sandwich, while the croque-madame adds the egg. Its café setting also explains why it often suits a simple meal between visits rather than a formal dining occasion, especially with a salad or simple accompaniment. Traditional preparations use Emmental or Gruyère, with Comté another option; some brasseries add béchamel sauce.