Knead butter, sugar, orange oil, salt and flour into a smooth dough. Wrap in plastic wrap and let rest for about 1 hour.
Preheat the oven to 190 °C. Line a baking tray with baking paper.
Roll out the dough on a lightly floured work surface to about 4 mm thick. Using a topping ring (or a suitable cookie cutter), cut out disks and place on the prepared baking sheet. If you like, press in an additional pattern with a cookie stamp.
Then place the tray in the preheated oven and bake the cookies for about 20 minutes until golden brown.
Afterwards, let the orange shortbread cool well on a cooling rack.