1 C. butter
2 C. brown sugar
1/2 C. corn syrup
1 tsp. salt
1/2 C. baking soda
1 tsp. vanilla
6 qts. popcorn
Melt butter; stir in brown sugar, syrup and salt. Bring to boil, stirring constantly. Boil, while stirring, for 5 minutes. Remove from heat. Stir in soda and vanilla. Pour over popcorn. Place in shallow pan.
Bake 1 hour at 250°; stir every 15 minutes.