1/2 cup butter
1/2 cup Karo syrup (light)
1 cup brown sugar
1 tbsp vanilla
1 cup unpopped popcorn

Pop popcorn, put in large brown paper bag.  Cook butter, syrup, sugar and vanilla in
microwave until bubbly.  Pour over popcorn; cook 1 minute in microwave.  Shake
bag, cook another 1 minute in microwave and shake.