2 c. brown sugar
1/2 c. light corn syrup
1 tsp. salt
1/2 tsp. baking soda
1 tsp. pure vanilla extract
6 quarts popped popcorn
Melt butter, stir in brown sugar, corn syrup and salt
Bring to a boil, stirring constantly, then boil, without stirring for 5 min. Remove from heat, stir insoda and vanilla. Gradually pour over popped popcorn, mix well. Turn into two large, shallow baking pans. Bake at 250 degreesF for 1 hour. stir every 15 min.
Remove from oven, cool completely, break apart and store in tightly covered container.