El Submarino- Argentinian Hot Chocolate

The idea for this originally came from here.

In Argentina they serve mugs of hot vanilla milk with a thick rectangle of dark chocolate served alongside. The chocolate is the submarine and should be sunk into the hot milk. As you stir, the milk becomes hot chocolate, and a treat of melted chocolate "sludge" awaits you at the bottom of the cup. 4 cups whole milk
1/4 cup sugar
1 teaspoon vanilla extract
4 ounces bars of good quality dark chocolate,broken into 1 ounce pieces

You can make this one of two ways. You could pour the milk into a saucepan, stir in the sugar and the vanilla and heat the milk until it is just about to boil. Or you could heat 2 1/2 cups of water until boiling, Add the vanilla and sugar and stir until sugar is dissolved. Add 1 can of Evaporated Milk to the water and, stir.

In either case, when you are finished with warming the milk, divide milk into 4 mugs. Serve each mug with the blocks of chocolate. Enjoy!