12 oz. chocolate chips
1 (14 oz.) can Borden Eagle condensed milk
1 2/3 c. light corn syrup
1 c. butter

In top of double boiler over simmering water, melt the above until smooth, stirring often. Then cook without stirring for 30 minutes over hot water. Let stand to cool slightly. Put mixture in blender until smooth. Makes about 1 quart.