Heat the condensed milk in a saucepan and stir in the cocoa powder and sugar one after the other until the cocoa is completely dissolved. Stir the freshly brewed coffee and sherry into the cocoa milk and bring it back to just before the boiling point.
Pour into 4 cups and decorate with the chocolate shavings al Gusto.
Vietnam is one of the largest countries where coffee is produced and drunk. A favorite pastime of the Hanoi people is to sit in cafes and enjoy a coffee while mad traffic rushes through the busy streets. The most famous type of coffee is ca phe sua da or ...