In a large bowl, cream the butter and sugar together. Beat in the eggs one at a time and add the lavender oil.
Slowly add in the flour, baking powder, salt and lavender then mix to form a soft dough. Cover and chill for one hour.
Preheat the oven to 180°C and line baking trays.
Roll out the dough on a floured surface to about 3mm thick.
Cut into elegant plain round cookie shapes then place the cookies onto a baking tray.
Bake the cookies in the preheated oven for 6 to 8 minutes, or until just golden brown
Cool on a wire rack.