Salted caramel popcorn

This is actually a double recipe. but trust me on this one, it goes fast!

1 cup packed brown sugar (I know, but bare with me, here)
1/4 cup butter
1/2 cup karo syrup (or light colored corn syrup)
1/2 tsp baking soda
1/2 tsp vanilla
12 tbsp unpopped air pop popcorn.
1 tsp sea salt

Pop the popcorn in an air popper.
Preheat oven to 250.
Melt butter, syrup and sugar in a pot on medium. Bring to a boil and cook for 4-5 minutes, stirring constantly. Add vanilla and baking soda. Pour over popcorn, and mix well. Add salt, mix again. Bake for 15 minutes. Stir, eat. :-)