Thaw frozen puff pastry. Moisten the trays and line them with baking paper. Roll out the puff pastry on a lightly floured surface into a plate of approx. 30 x 25 cm, brush with the room-temperature butter and with a little sugar and the vanilla sugar. Roll up the dough loosely from both sides up to the middle, flatten it a little and wrap it in baking paper and put it in a cool place until the roll is firm.
With a sharp knife without pressure, cut into 1 cm thick slices
cut and place them on the baking sheet so that the layers of dough are not too tight. Put the pig ears in a cool place and preheat the oven to 200 ° C.
Bake the pieces in the oven on the middle rack for 15-20 minutes, turn after half the baking time and reduce the oven temperature to 160 ° C in the last 5-10 minutes. After baking, let the pork ears cool on a rack.