10cupsair popped popcorn(see note above if you do not have an air popper)
6cupsmini marshmallows(5 cups for less gooey popcorn balls) (250 grams)
Place popcorn in a lightly greased, large bowl. Set aside.
Over medium heat, melt marshmallows, butter and corn syrup until smooth.
Pour over popcorn in bowl and stir well.
Lightly grease your hands with non stick spray (or make them slightly damp), then roll handfuls of popcorn into balls (I prefer not to press them to firmly together). Set on a large piece of wax paper for 15-20 minutes to set.
Store in an airtight container for 1-2 weeks, or wrap individually in plastic wrap if giving to friends and family.