Place puff pastry sheets next to each other on a floured work surface and allow to thaw. Mix cinnamon, 30 g sugar and 2 sachets of vanillin sugar. Place the puff pastry sheets on top of each other. Roll out into a rectangle (approx. 30 x 40 cm) on a floured work surface.
Sprinkle cinnamon-sugar mixture evenly over it. Roll the dough from both narrow sides towards the middle. Cover the dough roll and let it freeze in the freezer for about 30 minutes. Cut the dough roll into slices about 1 cm thick.
Place the slices of dough on a baking tray lined with baking paper. Mix 20 g sugar and 1 packet of vanilla sugar and sprinkle evenly over the pig's ears. Bake in the preheated oven (electric: 225 ° C / gas: level 4) for 10-12 minutes until golden brown.
Let it cool down on a cake rack.