Popcorn Balls 

5 quarts popcorn, popped
2 cups sugar
1 1/2 cups water
1/2 teaspoon salt
1/2 cup light corn syrup
1 teaspoon vinegar
1 teaspoon vanilla 

Keep popped corn hot and crisp in oven (300 - 325 F). Butter sides of saucepan. 
In it combine sugar, water, salt, corn syrup, and vinegar. Cook to hard-stage
 (250 F). Add vanilla. Pour slowly over hot popped corn, mixing well to coat every 
kernel. Press into balls (butter hands if necessary). Try not to burn your hands.