Add butter and sugar to a bowl. Mix it well until a creamy mixture is formed. Now add flour, cornflour, baking powder and salt to the butter-sugar mixture. Keep folding it until well combined.
Once a soft dough is formed, cover it and keep it in the fridge for 20 minutes.
Now pinch out small balls from the dough, roll them between your hands to form a smooth ball and place it on a baking tray lined with parchment paper.
Bake the cookies for 15-20 minutes at 170 degrees Celsius. Once baked, garnish them with powdered sugar or icing of your choice.