Caramel Popcorn
["2 gal. unsalted popcorn", "2 c. brown sugar", "2 sticks butter", "1/2 c. Karo syrup", "1/2 tsp. baking soda", "1 tsp. vanilla"]
["Cook syrup, butter and sugar for 5 minutes.", "Add vanilla and baking soda.", "Stir well.", "Pour over popcorn and mix well.", "Put in 2 baking pans and bake at 250\u00b0 for 1 hour.", "Stir every 15 minutes."]
["brown sugar", "butter", "syrup", "baking soda", "vanilla"]