16 c. unsalted popped corn
1 c. brown sugar
1/2 c. butter
1/4 c. white corn syrup
1/2 tsp. salt
1/2 tsp. baking soda
1 tsp. vanilla

Place popcorn in brown paper bag. In 8 cup bowl, combine sugar, butter, syrup and salt. Mix 1 to 2 minutes on high. Stir. Boil mixture for 3 minutes, stirring after each minute. Add soda and vanilla. Stir well. Mixture will foam. Pour over popcorn in bag. Close bag and shake. Microwave on high 1 minute. Shake. Microwave on high 1 minute. Shake. Microwave 30 seconds. Shake. Microwave 30 seconds. Shake. Pour onto cookie sheets and cool.