1 c. Karo syrup
1/2 c. sugar
1 tsp. cream of tartar
2 tbsp. butter
1 tsp. vinegar
1/2 tsp. baking soda
4 qts. popped corn, unsalted

Boil syrup, sugar, cream of tartar and vinegar to soft ball stage. Add butter and soda. Pour over corn. Cool a few minutes and shape into balls while still warm.