Prepare the peanut butter mixture: In a medium bowl, mix the creamy peanut butter and powdered sugar until smooth and fully blended. The mixture should be thick yet spreadable, with no lumps, ensuring that it will coat the pretzels evenly in the next step.
Add pretzels: Fold in the broken pretzel pieces, making sure each piece is coated with the peanut butter mixture. Use a gentle folding motion to keep the pretzels from breaking further while distributing the mixture evenly throughout.
Form clusters: Use a spoon to drop small portions of the peanut butter–pretzel mixture onto a parchment-lined baking sheet. Shape each mound into a compact cluster, roughly bite-sized, to ensure they hold together once coated with chocolate.
Melt the chocolate: In a microwave-safe bowl, melt the chocolate chips with coconut oil (if using) in 20-second intervals, stirring in between, until the chocolate is completely smooth and glossy. This prevents overheating and ensures an even coating on the clusters.
Coat clusters: Drizzle the melted chocolate over the peanut butter pretzel clusters, or dip the bottoms of the clusters into the chocolate for a thicker coating. Make sure the chocolate covers the clusters evenly for maximum flavor and visual appeal.
