Grandma Solomon's Popcorn Balls

This is another recipe I remember Grandma making....what a treat.

5 quarts of popped popcorn (NOT MICROWAVE)
2 cups sugar
1 1/2 cups water
1/2 teasp salt
1/2 cup light corn syrup
1 teasp white vinegar
1 teasp vanilla

Keep popcorn hot and crisp in a slow oven (300 to 325 degrees)
Butter sides of a saucepan, combine sugar, water, salt, corn syrup, and vinegar. Cook to a hard ball stage (250 degrees) Stir in vanilla, slowly pour over hot popcorn, stirring just until mixed through. butter hands lightly, shape popcorn into 4 inch balls.
makes 9 balls