Cracker Jack
["1 (10 oz.) bag prepopped popcorn", "1 c. butter", "1 lb. brown sugar", "2 tsp. salt", "1/2 tsp. baking soda", "1/2 c. light Karo", "peanuts or mixed nuts to taste", "1 1/2 tsp. vanilla"]
["Mix butter, sugar, salt and Karo.", "Bring to a boil over medium heat.", "Boil for 5 minutes, stirring constantly.", "Remove from heat. Add 1 1/2 teaspoons vanilla and baking soda."]
["popcorn", "butter", "brown sugar", "salt", "baking soda", "light Karo", "peanuts", "vanilla"]