4 1/2 c. sugar
13 oz. can evaporated milk
3 - 6 oz. pkgs. semi-sweet chocolate chips
1/4 lb. butter (1 stick)
1 c. chopped walnuts
3 tsp. vanilla

Boil sugar and milk 10 minutes. Remove pan from stove, add chips, butter, vanilla and nuts. Beat until chips are well blended. Pour into buttered 9 x 13 inch pan.