Heat 1/3 of the Milk in a small saucepan.
Melt Cortés Chocolate Bar Fingers in said pot.
In another container, heat the rest of the milk and dissolve the marshmallows.
Pour both liquids into a bowl and mix until smooth.
Pour the mixture into individual cups and chill in the fridge for 1 hour.
Decorate with Cool Whip and drops of Cortés Chocolate to taste.