One cup (240 millilitre) cold heavy cream ½ cup (160g) either homemade or store-bought Nutella
Put the Nutella in a bowl fit for a microwave-safe and microwave for a few short seconds to soften. Let it cool gently.
Beat the heavy cream until it develops stiff peaks in another bowl. Fold the melted Nutella gently until completely mixed and no streaks show.
Spoon the mousse into a pipework bag. Refrigerate one hour before piping if the mousse is too runny.
Pipe into serving dishes; chill for at least four hours. Top with chocolate shavings, hazelnuts, or any toppings of choice before presenting.