Cranberry Popcorn Balls

2 cups sugar
1 cup whole berry cranberry sauce, slightly mashed
1 tablespoon grated orange peel
1/2 cup cranberry juice
1/2 cup light corn syrup
1 teaspoon vinegar
1/2 teaspoon salt
5 quarts unsalted popped popcorn

Combine all ingredients, except popcorn, in a heavy saucepan. Bring to a boil; lower heat and cook to 250 degrees on a candy thermometer. Mixture will bubble up, so watch to keep from boiling over. Pour slowly onto hot popcorn and mix until well-coated. Let stand 5 minutes or until mixture can easily be formed into balls. Butter hands and form into 3-inch balls.
Courtesy of The Popcorn Board