For 6 servings, heat over low heat 2 squares unsweetened chocolate (2 oz.) and 1 cup water, stirring until chocolate melts. Add a pinch of salt and 3 to 4 tablespoons sugar. Boil 4 minutes, stirring. Then slowly stir in 3 cups milk. Heat until scalded. Do not boil. Just before serving, beat with rotary beater until smooth. Top with whipped cream. Serve Hot.