1. Prepare the Crust:

1. Preheat oven to 250°F (120°C). Line a baking sheet with parchment paper.
2. In a large bowl, combine popcorn and pretzel sticks.
3. In a small saucepan, melt butter and brown sugar over medium heat, stirring until smooth.
4. Pour butter mixture over popcorn mixture and toss to coat evenly.
5. Spread mixture on prepared baking sheet and bake for 30 minutes, stirring every 10 minutes.
6. Remove from oven and let cool completely.
7. Melt white chocolate chips and drizzle over cooled mixture.
8. Immediately sprinkle with M&M’s and pastel sprinkles.
9. Let chocolate set before breaking into clusters and serving.