SUPREME CHOCOLATE SAUCE

1 (6 oz) package chocolate pieces
1/4 cup butter
1 cup sifted powdered sugar
dash salt
1/2 cup light corn syrup
1/4 cup hot water
1/4 cup creme de cacao
1 teaspoon vanilla

Combine chocolate, butter, sugar, salt, corn syrup and water in heavy saucepan. Stir over low heat until chocolate melts. Remove from heat and add liqueur and vanilla. Serve immediately over ice cream or pound cake. Or, pour hot mixture into hot, sterilized jars (pints) and cool. Store in refrigerator.