01 - Line a large baking sheet with parchment paper or a silicone baking mat to prevent sticking.
02 - In a large mixing bowl, combine Rice Chex cereal, mini pretzels, and popped popcorn.
03 - Pour the melted white chocolate over the dry mixture and gently toss until all components are evenly coated.
04 - Add mini marshmallows, green chocolate candies, and white chocolate chips. Toss gently to distribute evenly throughout the mixture.
05 - Spread the coated mixture in an even layer on the prepared baking sheet.
06 - Immediately sprinkle the rainbow sprinkles over the top before the white chocolate begins to set.
07 - Allow the mix to sit at room temperature for 20 to 30 minutes until the chocolate completely hardens.
08 - Break the hardened mixture into clusters and serve immediately, or store in an airtight container for up to 5 days.