Put flour and cold, cubed butter in a bowl, and crumble.
Add rest of ingredients and knead to a dough.
Divide in two pieces, and form to a roll.
Place in fridge for about ½ an hour.
Cut off small pieces and form to Crescent Cookies. Use some flour if necessary.
Place cookies on a baking tray with baking paper and bake in preheated oven at 180° C for about 10 minutes.
Leave to cool.
Chop white chocolate and melt (over bain-marie).
Dip the ends of the cookies in the chocolate and leave to dry.
Store in a cookie tin.