2 c. brown sugar
2 c. white Karo
1/2 c. butter
1 can sweetened condensed milk
1 tsp. vanilla

Combine sugar, Karo, butter. Bring to a boil. Add condensed milk and stir constantly to 234-238 degrees. Remove from heat and add vanilla. Stir and pour over 10-15 quarts popped corn. Stir and form into balls.