01 - Line a large baking sheet with parchment paper or a silicone baking mat and set aside.
02 - In a large mixing bowl, combine Rice Chex cereal, mini pretzels, and popped popcorn. Mix well to distribute evenly.
03 - Pour melted white chocolate over the cereal mixture. Gently toss with a spatula until all pieces are evenly coated.
04 - Add mini marshmallows, green chocolate candies, and white chocolate chips. Toss gently to distribute throughout the mixture without crushing the marshmallows.
05 - Spread the mixture in an even layer on the prepared baking sheet. Immediately sprinkle rainbow sprinkles over the top before the chocolate begins to set.
06 - Allow the mix to sit at room temperature for 20 to 30 minutes until the chocolate hardens completely and the coating is firm to the touch.
07 - Break into clusters and serve immediately, or store in an airtight container at room temperature for up to 5 days.