Take butter and sugar in a bowl and whip them together until they are well incorporated and smooth in texture.
Add vanilla essence and salt to it.
Slowly, add the flour in two batches to it. Mix it well.
Fold the nuts into it.
Take small ball of it and press it into a small circle.
Take a baking tray, put a sheet over it. Line the cookies on a sheet.
Pre-heat the oven at 170 degree centigrade.
Bake for five to ten minutes, until golden in colour.
Remove and coat them in the castor sugar.
Put them back on the rack.
Once they are cool, store in an airtight container.
