1 cube butter
1 cup brown sugar
1/4 c. karo syrup
1/2 tsp. salt
1/2 tsp. vanilla
1/4 tsp. soda
2 air poppers worth of popcorn
Boil butter, brown sugar, karo syrup and salt for 5 minutes stirring constantly. Remove from heat. Add vanilla, mix. Stir in soda. Pour over popped popcorn and mix well.
Spread onto two cookie sheets and bake in a 250 degree oven for one hour (stirring every 15 minutes).