Caramel Popcorn
["4 qt. popped corn", "1 c. margarine (2 sticks)", "2 c. firmly packed brown sugar", "1/2 c. Karo syrup", "1/2 tsp. baking soda"]
["Boil together margarine, sugar and syrup. Add baking soda. Pour hot syrup mixture over popcorn to coat evenly.", "Bake at 250\u00b0 for 30 to 40 minutes."]
["corn", "margarine", "brown sugar", "syrup", "baking soda"]