Prepare two baking sheets with parchment paper. Set aside. In a large bowl, mix together chocolate chips, peanut butter chips, butter, and peanut butter.
Microwave on low power for 1-2 minutes, stirring every 20 seconds, until smooth (be careful not to scorch the chocolate!) You could also put everything in a double boiler to melt.
Add pretzels and peanuts to the melted chocolate mixture and gently toss to combine.
Drop spoonfuls of mixture onto prepared baking sheets. Refrigerate for 30 minutes, or until chocolate has set.
Video
Notes
Store peanut clusters in an airtight container in the fridge for up to 1 months.Chocolate: Be sure to use high quality chocolate chips (like Ghirardelli), or Bakers chocolate bars will work. I prefer semi-sweet, but you could use milk or bittersweet.