Divide popcorn in half, place half of the popcorn onto a baking sheet, spreading in an even layer.
10 cup popcorn
Place candy melts in a resealable sandwich bag but do not seal. Microwave bag on 50% power for 30 seconds, three times, kneading bag after each time in the microwave until melted. Seal bag and snip the tip.
½ cup Lavender candy melts
Drizzle candy melts over popcorn on the baking sheet. Top with unicorn sprinkles. Let set to harden.
unicorn sprinkles
Break apart colored popcorn and mix with the reserved plain popcorn. Add unicorn horns, vanilla chips, and marshmallows and mix well.
unicorn horns, ½ cup unicorn morsels, ½ cup marshmallow bits
Serve immediately or store in a sealed container or bag until ready to use.