Begin by breaking your pretzel sticks into smaller pieces, about 2 to 3 inches long, using your hands in a large mixing bowl.

In a separate medium bowl, combine the creamy peanut butter and powdered sugar. Stir thoroughly until the mixture is thick and smooth.

Pour the peanut butter mixture over the broken pretzel pieces in the first bowl. Gently fold the ingredients together.

Using your hands, scoop out small handfuls of the mixture and form bite-sized clusters, approximately 1 to 2 inches in diameter.

If desired, melt the chocolate chips in a microwave-safe bowl, heating them in 30-second intervals until smooth.

Place the baking sheet in the refrigerator and chill the clusters for about 30 minutes, or until they become firm.

Carefully transfer the clusters to an airtight container, ensuring they are layered with parchment paper if stacking.