Popcorn Balls - cooking recipe

Ingredients

1 c. Karo syrup
1 c. brown sugar
1/4 c. water
1 tsp. vinegar
1 Tbsp. butter
2 qt. popcorn

Preparation

Combine first 4 ingredients.
Cook on medium heat; stir constantly until it starts boiling.
Cook until it forms a ball when dropped in cold water.
Add butter and popcorn.