Carmel Popcorn

1 can eagle brand condensed milk 1 C. karo syrup 1/2 cup butter 1 pound brown sugar 1 tsp vanilla Put brown sugar and karo syrup and butter in pan to a boil, add can of eagle brand milk, slowly bring to a boil again. Cook until a soft ball stage. Add 1 tsp vanilla. Covers 3 gallons of popped popcorn.