Cow butter softened at room temperature and stir it with powdered sugar. Mix marmalade with fresh milk and vanilla. Add this mixture to the beaten butter and sugar. Blind biscuits with cream so as to obtain a roll, we put in the fridge to harden, remaining cream reserve. Tepid roll spread with remaining cream (at room temperature, in order to smear) and sprinkle with the ground walnuts. When the roll is ready we cut it diagonally to look into strips. * Can be made with cocoa cream, as the assembly is the same: 125 g butter 1/3 cup powdered sugar 2 tbsp cocoa 1/4 cup milk 1 tsp rum * 1 cup = 250 ml