Pop the popcorn according to package instructions and pour into a large bowl
Preheat oven to 250 F
In a medium size pot, combine corn syrup, brown sugar and butter. Bring to a boil for roughly 1 minute and reduce heat
Continue boiling over low-medium heat for roughly 3-4 minutes, then remove completely from heat
Add in 1 tsp baking powder, bourbon and apple cider - mixture will quickly begin to rise and thicken
Stir sauce well to ensure no clumps are left behind form baking soda and allow to cook for 1 more minute, stirring constantly
Immediately pour sauce over popcorn and stir well to coat
Spread coated popcorn onto a large greased baking dish (one with sides) and bake for 30 minutes
Remove from oven and allow to cool before breaking apart. Do not allow popcorn to sit on this dish for a long period of time. I recommend immediately transferring to a serving bowl or bag after breaking apart to prevent popcorn from sticking to the pan
Serve and enjoy!