Prepare the Mixing Bowl: In a large mixing bowl, combine the popped popcorn, pretzel sticks, chocolate candies, and nuts. Set aside.
Melt the Chocolate: In a microwave-safe bowl, combine the chocolate chips and peanut butter. Microwave in 30-second intervals, stirring in between until smooth and fully melted.
Combine the Ingredients: Drizzle the melted chocolate mixture over the popcorn and pretzel mixture. Stir gently to coat everything evenly.
Add Sweetness: Sprinkle the powdered sugar over the mixture and mix again until well combined.
Cool and Serve: Spread the mixture onto a baking sheet lined with parchment paper to cool. Once it has set, break it into pieces and serve.