Line your counter top with parchment paper or wax paper. In an extra-large bowl, toss together 4 cups marshmallows and JollyTime popcorn. Set aside. In a medium-sized pot over medium-high heat, combine corn syrup, butter, water, powdered sugar, and remaining 1 cup marshmallows. Heat and stir until mixture comes to a boil. Remove from heat and quickly whisk in vanilla and salt. Pour mixture over popcorn and marshmallow mixture, carefully stirring to coat each popcorn kernel. Let cool for a few minutes, until you are able to touch it without burning your fingers, and then work quickly to shape popcorn into 3-4 inch balls before they cool.

**Buttering your hands/fingers will keep popcorn mixture from sticking to you too much. Wrap any popcorn balls not eaten fresh with cellophane or plastic wrap and store at room temperature for up to 5 days!