Crackerjacks Caramel Popcorn Recipe

My wife makes this and it has crackerjacks beat;

Put popcorn in shallow roasting pan (large pan). In heavy saucepan mix sugar, butter and corn syrup. Stir over medium heat until boiling. Continue boiling 5 min. without stirring. Remove from heat; add vanilla and baking soda. Pour over popcorn; stir to coat well.

Bake in preheated 250 degree oven for 1 hr., stirring several times. Cool, break apart and store in tightly covered container. (Cool on waxed paper so it won't stick to pan) Note; if desired 1 cup. peanuts may be added to popcorn BEFORE adding caramel sauce.