Add the milk to a medium saucepan and place over medium high heat. Stir occasionally just until the milk is beginning to steam. Add the chocolate, Nutella, cocoa powder, and sugar, and whisk constantly until everything has dissolved and the cocoa is smooth. Remove from the heat and ladle into mugs. Top with whipped cream, hazelnuts, and extra chocolate shavings.
Enjoy!
Keyword chocolate, cocoa, dessert, drinks, hot chocolate, nutella