01 - Line two baking sheets with parchment paper or silicone mats to prevent sticking and ensure easy removal.
02 - Combine chocolate chips, butterscotch chips, and butter in a large microwave-safe bowl. Microwave in 30-second intervals, stirring thoroughly after each interval, until completely melted and smooth, approximately 1 to 2 minutes total.
03 - Let the melted chocolate mixture cool for 2 to 3 minutes to prevent marshmallows from melting when combined.
04 - Gently fold peanuts and marshmallows into the cooled chocolate mixture until all components are evenly coated.
05 - Using a tablespoon or small cookie scoop, drop portions of the mixture onto prepared baking sheets, spacing each cluster about 1 inch apart.
06 - Allow clusters to set at room temperature for 2 hours or refrigerate for 30 to 40 minutes until firm to the touch.
07 - Transfer cooled clusters to an airtight container and store at room temperature for up to 1 week.