Caramel Popcorn Balls

10 cups
⅓ cup
½ cup
1 cup
1 tsp

Melt the butter in a soup pot. Add corn syrup, brown sugar, and vanilla. Stir and bring to a boil. Remove from heat. Add popcorn and mix in. put waxed paper on countertop. Form popcorn balls and lay on wax paper to harden. Makes about 12 balls