Caramel Popcorn

This recipe is from Grandma Shipton. It is the best I have found so far and it's easy to remember.  (5 bags of popcorn and five ingredients! That's it, all in ONE measurements)

5 bags of popcorn, popped

The Caramel:
1 cube butter
1 cup brown sugar
1 cup corn syrup
1 cup sweetened condensed milk
1 cup white sugar

(not so healthy eh?)

Heat ingredients over medium in a sauce pan.  Bring to boil. Stir constantly (to prevent burning on the bottom) until it forms soft ball stage.  To test the caramel drop a teaspoon of the mixture in cold water.  If you can pull out a ball of caramel then it's ready! Poor over popcorn, stir coat and enjoy.  This caramel sauce can be used on ice-cream, Christmas candy, or to dip apples in.