Put cacao powder, the cookie crumbles/smashed biscuits, vanilla sugar and the icing sugar in a bowl.
Divide the margarine in small bits .
Add the margarine in the dry ingredients and mix it together with a fork.
Add the arak liquid in the bowl and stir it together.
Make the dough in preferred roll sizes (approximate 5 centimeter).
Let the rolls rest in the fridge for about 30 minutes.
Roll out the marzipan on the table and cut about 5 centimeters wide pieces, and roll the dough in the marzipan. Make sure the edges is on the bottom of the rolls.
Melt the chocolate in a bowl, and dip the ends of the rolls in the melted chocolate.
Let the vacuum cleaners rest in the fridge until it is time to serve.