Mix the rum with the vanilla pulp, Nutella and espresso powder until smooth. Then whip the powdered sugar and cream until creamy and add to the mixture.
Pour the liqueur into a 0.75 l bottle and store in a cool place. Shake well before serving.
The liqueur can be kept for about 2 - 3 months, but it tastes so good that it doesn`t last that long with me!