Take one vessel add some water in it..on that keep another vessel (this is double boiler) in that add cocoa butter/butter to it..once it starts melting add (all purpose flour,icing sugar,coco powder and milk powder)mix all together and make till it melts completely and cooked..fill in the moulds..can also add chopped nuts to it..keep in freezer for 2 hours..yummy choclates are ready..