1 (14 oz.) can sweetened condensed milk
12 (3/4 oz.) Nestle's milk chocolate candy bars
1 1/4 c. light corn syrup
1 c. butter
3/4 tsp. vanilla

Place milk, chocolate, corn syrup, butter and vanilla in the top of a double boiler. Stir well to blend mixture over simmering water, about 10 minutes. Continue to cook mixture without stirring for 20 minutes. Cook to lukewarm and pour into a 6 cup covered container. Refrigerate. Thin with a few drops of milk when heating to serve.