In a medium saucepan stir together chopped chocolate, water, sugar, and whipping cream. Bring to boiling, whisking constantly. Boil gently for 1 minute. Remove from heat and stir in vanilla. Cover and chill overnight.Advertisement
Freeze mixture in a 1-quart ice cream freezer according to manufacturers directions. Ripen in freezer before serving. To serve, scoop into small glasses or dishes.