Caramel Corn
["5 to 6 qt. popped corn (salted or unsalted)", "1 c. margarine", "2 c. brown sugar", "1/2 c. Karo syrup", "1/2 tsp. salt (if corn is unsalted)", "1/2 tsp. vanilla", "1/2 tsp. baking soda"]
["Heat the margarine, sugar and syrup in a heavy saucepan over medium heat.", "Boil for 5 minutes. Remove from heat.", "Add salt, vanilla and baking soda.", "Pour over corn and bake at 250\u00b0 for 1 hour.", "Stir every 15 minutes."]
["corn", "margarine", "brown sugar", "syrup", "salt", "vanilla", "baking soda"]