1/2 cup butter
2 (1 oz) squares unsweetened chocolate
2 cups sugar
1 cup evaporated milk
1/2 cup light corn syrup
1 tsp vanilla
Melt butter and chocolate, add sugar, milk,corn syrup and vanilla. Bring to a boil, stirring constantly. Boil for 1 1/2 minutes, remove from heat. Serve warm or cold and refrigerate leftovers.