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