Some say bacon makes everything better; I say Nutella is the magic enhancer. And here, hazelnut liqueur enhances the flavors of the chocolate-hazelnut spread. You could also use a different nut liqueur like walnut, for double nuttiness.
1Place milk, Nutella, and 2 tablespoons of the cream in a small saucepan over medium heat and whisk until the Nutella has melted and been incorporated.
2Reduce the heat to low, add 3 tablespoons of the hazelnut liqueur and the brandy, and stir to combine. Heat until hot (do not boil), then turn off the heat.
3Place the remaining 6 tablespoons cream in a medium bowl and whisk until nearly stiff peaks form, about 2 minutes. Add the remaining 1 tablespoon liqueur and whisk until just incorporated. Transfer the hot chocolate to heatproof serving glasses, top with a dollop of whipped cream, and serve.