Knead marzipan and 50 g icing sugar. Roll out the marzipan on a work surface dusted with icing sugar to a thin rectangle of approx. 32x28 cm. Roll out the short pastry on a lightly floured work surface to a rectangle of the same size.
Spread the dough thinly with orange marmalade and place the marzipan rectangle on top. Cut the rectangle lengthwise into two 14 cm wide strips and roll them up firmly from the long side. Cut the rolls into slices and spread them on 2 baking trays lined with baking paper.
Press the cookie slightly flat if necessary. Bake the trays one after the other in a preheated oven (electric: 200 °C / gas: level 3) for approx. 14 minutes. Let the cookies cool down on a cake rack. Wash the orange thoroughly, dab dry and peel off the skin in fine strips with a julienne chiseler.
Squeeze 1/2 orange. Stir the remaining icing sugar and 2 tablespoons of orange juice until smooth. Spread the cookies thinly with icing and sprinkle with orange julienne. Let them dry. Results in about 56 cookies.