- Pop popcorn, either in a large pot with a tablespoon of oil, or microwave popcorn. 
- Add salt while the popcorn is still hot. 
- Add a tablespoon or two of melted butter and stir well to combine. 
- Place the popped popcorn in a large bowl. 
- In a microwave-safe bowl place marshmallows, butter, brown sugar, 
- Microwave on high for 1:30-2 minutes until all is melted (stop microwave after 1 minute and stir, then start again) 
- The mixture is very sticky. 
- Add in vanilla and pumpkin pie spice to marshmallow mixture 
- Stir well, then pour over popcorn and toss popcorn well to completely coat all popcorn. 
- Place the coated popcorn on a parchment-lined baking sheet and allow popcorn to cool.