In a pan combine
butter, corn syrup, and brown sugar, stirring as it melts together.
Bring to a boil while continuing to stir and boil for one (1)
minute. Remove from heat and add vanilla.
mixture over popped corn mixture and stir to coat.
Bake at 350°
for 15-20 minutes. Remove from oven and spread over wax paper
to cool. Store in an air-tight container.