Line a baking sheet with parchment paper or a silicone mat to prevent sticking.

Place the peanut butter and chocolate chips in a microwave-safe bowl. Microwave in 20–30 second intervals, stirring between each, until the mixture is smooth and glossy.

Stir in vanilla extract and powdered sugar if using until fully combined.

Add the crushed pretzels and fold gently until they’re evenly coated with the peanut butter–chocolate mixture.

Drop spoonfuls of the mixture onto the prepared sheet to form clusters.

Sprinkle a pinch of sea salt or any toppings if desired.

Refrigerate for 20–30 minutes, or until the clusters are firm and set.

Serve chilled or store in an airtight container in the fridge.