Popcorn Balls
["3 c. sugar", "1 c. light or dark syrup", "1 c. boiling water", "2 Tbsp. vinegar", "1/2 tsp. baking soda, dissolved in 1 tsp. hot water", "1 stick butter", "6 qt. corn, already popped"]
["Mix the first 4 ingredients well.", "Boil until a bit dropped in cold water forms a firm ball.", "Dissolve the baking soda in hot water and butter.", "Pour over the popped corn (already popped and which the unpopped kernels have been removed).", "Stir well; form into balls."]
["sugar", "light", "boiling water", "vinegar", "baking soda", "butter", "corn"]