Start by melting the chocolate in a small pan over medium heat or in the microwave.

Since the chocolate bars have small bits of cookies in them, keep a close eye on it while melting. It's easier to burn this type of chocolate bar than most. Once melted remove from heat and stir in the sugar and hot cocoa mix until well combined.

Combine the chocolate mixture with the milk and ice in a blender. Puree. Pour into 3-4 tall glasses and garnish with whipped cream and, if you want, a toasted marshmallow.