Butter Toffee Popcorn
["1 1/2 c. unpopped popcorn (then pop)", "3 sticks margarine", "2 c. brown sugar", "1/2 c. white Karo syrup", "1 tsp. soda"]
["Boil butter, sugar and Karo for 5 minutes.", "Remove from heat. Add soda and stir.", "Pour over popped corn.", "Stir to coat and bake 1 hour at 200\u00b0.", "Stir once during baking."]
["margarine", "brown sugar", "white Karo syrup", "soda"]