Mix the soft butter with the sugar, powdered sugar, a pinch of salt and the orange oil or zest with the mixer until creamy.
Gradually add the flour and work in with the dough hook.
Shape the pastry into a ball with your hands and place it on a baking sheet lined with baking paper. Place a layer of baking paper over it and carefully roll out the dough between the layers of paper with a rolling pin or a bottle, up to all edges. The dough should be approx. 1-1.5 cm thick.
Prick the rolled out dough evenly, close together, with a fork. It already has the typical shortbread pattern.
Bake in the oven at a preheated 160 ° (gas level 1 - 2) for approx. 20 - 30 minutes until golden yellow to light brown.
Check again and again after 20 minutes so that they don`t get too dark !!!
Cut the wonderfully fragrant pastries while they are still hot in the form into Fingers (1.5 x 5 cm long pieces) and sprinkle with the vanilla sugar immediately.
Caution: do not burn your mouth while snacking greedily (and inevitably)!