Gradually pour 7½ dl (1¼ pt or 3¼ U.S. cups) boiling water over 300 g (11 oz) freshly ground coffee and allow to filter slowly. Place in a pan with 600 g (1 lb 5 oz) loaf sugar and allow to cool. Now add 1 litre (1¾ pt or 4½ U.S. cups) boiled milk which has been flavoured with vanilla and allowed to cool, and 5 dl (18 fl oz or 2¼ U.S. cups) very fresh cream.
Freeze in the ice-cream machine but see that the mixture remains almost liquid. Serve in very cold cups.