01 -
Pour popped popcorn into a big bowl, chuck any unpopped bits.
02 -
Throw butter, corn syrup, and brown sugar in a pot and start warming on medium.
03 -
Keep stirring so everything melts together nicely.
04 -
Drop in marshmallows and vanilla, then stir until the gooey stuff blends in.
05 -
Cover the popcorn with this marshmallowy mix.
06 -
Toss till every piece looks glossy and coated.
07 -
Spread everything out on a baking pan and wait for it to cool down.