2In a pot, heat on medium 2 sticks of butter, 2 cups of light brown sugar, 1/2 cup of dark karo syrup and some salt for 5 minutes, until smooth and butter is melted.
3Remove unpopped kernels from the popcorn.
4Pour the caramel over the popcorn and mix until every kernel is coated.
5Place the caramel popcorn in a 250*F oven for 1 hour. Every 15 minutes, break up the popcorn to make it more crunchy.