Carefully heat the cream with the dark chocolate, the pulp of a vanilla pod and the marshmallows and melt the chocolate and marshmallows, then whip and allow to cool.
Fill into molds (I used carrot molds) and place in the freezer. Free from the chest half an hour before serving.
The chocolate fluff tastes like a giant praline. Serve with vanilla ice cream, cherries and strawberries with cream.