Original: In some cafes in Belgium and other areas in Europe, one who orders a "warme chocolade" or "chocolat chaud" would receive a cup of steamed white milk and a small bowl of bittersweet chocolate chips to dissolve in the milk.
Simplified: Some cafes in Belgium and other areas in Europe serve a "warme chocolade" or "chocolat chaud". This is a cup of heated milk and a small bowl of bittersweet chocolate chips to put in the milk.