The submarino (meaning "submarine" in Spanish) or remo (meaning "oar") is a beverage traditionally drunk in Argentina and Uruguay. It consists of a bar of dark chocolate melted inside a glass of hot milk and stirred with a long spoon (similar to an iced tea spoon) until the chocolate is completely dissolved.
It is most typically enjoyed in the winter, and is traditionally served in a long, glass cup held in a metal cup holder. The holder is designed with a handle so that the glass can be held without burning oneself, as the submarino is served piping hot to ensure that the chocolate melts completely.[1] [2]
The following images show the traditional preparation of the submarino: