1/4 c. butter
1 c. brown sugar
1/2 c. light corn syrup
1/2 (15 oz.) can sweetened condensed milk (2/3 c.)
1/2 tsp. vanilla
5 qts. popped corn

In saucepan combine butter, sugar, and corn syrup. Stir well and bring to boiling. Stir in sweetened condensed milk, simmer, stirring constantly, until soft ball stage. Stir in vanilla. Pour over popped corn, stir to coat. Butter hands, shape into balls.