1 cup butter
1 tsp. vanilla
2 cups brown sugar
½ tsp. baking soda
½ cup white corn syrup
24 cups pre-popped buttered popcorn (Purchased at a store)
1 tsp. salt
Put the 24 cups of popcorn in a large baking pan. (A turkey roaster works great.) Set aside. Melt the butter in a medium size saucepan. Add the brown sugar, corn syrup and salt. Bring to a boil and cook exactly for 5 minutes, stirring constantly. Add the vanilla and baking soda. Stir well. It will foam up. Pour this mixture over the popcorn. Stir gently to coat every kernel.
Bake in oven at 225 degrees for one hour. , stirring gently every 15 minutes. Tip out on wax paper to cool. Store in an airtight container.