For the marzipan potatoes, first form the nougat into small balls with damp hands and place them in the freezer.
Knead the marzipan with the powdered sugar and a little liquid (it is better to add less at first so that the marzipan does not become too fluffy). Form into a roll and cut off pieces of equal size. They must be able to enclose the nougat balls later.
Flatten the marzipan pieces on the palm of your hand and place a nougat ball in the center of each. Form marzipan into a ball all around.
Roll the marzipan potatoes in cocoa powder.