Sift together the flours and salt.
Powder the sugar and cream it with butter till fluffy.
Add the flour to it. Mix in the vanilla sugar or vanilla essence. Incorporate everything together by mixing lightly. Do not knead.
Refrigerate for half an hour
After half an hour , make even sized roundels and place it apart from each other on a baking tray.
Preheat the oven at 180°C for 10 minutes.
Bake the cookies for about 10 - 12 minutes in the middle rack at 180°C .
Transfer to cooling rack , once the corners turn golden brown.
Store in air tight containers once cooled.