Pop your popcorn with whatever method you choose. Place half of the popcorn in a 9x13 baking pan.
In a saucepan heat Melt or butter on low until all of it is melted. Add brown sugar and corn syrup and stir for about 2 minutes, or until sugar is dissolved and well combined.
Add baking soda and stir for 30 seconds until caramel becomes bubbly. Turn off heat and pour half of the caramel sauce on popcorn in pan.
Take your dark chocolate chips and melt them in a microwave safe dish for 20-30 seconds, stirring until chips are all melted.
Drizzle melted chocolate all over caramel corn and allow to harden for 20 minutes. Enjoy! Serves 4.