Line your kitchen counter with parchment paper or prepare three baking sheets with parchment, as this recipe makes a large batch.
In a 5-quart or larger slow cooker, add white melting chocolate, sweet baking chocolate, and semi-sweet chocolate chips.
Cover with the lid and set the slow cooker to LOW for 1-2 hours, stirring occasionally to ensure the chocolate doesn’t burn.
Add all the peanuts to the slow cooker and mix thoroughly to coat them evenly in the chocolate.
Replace the lid and switch the slow cooker to Warm, or turn it off while leaving the crock in place to keep the mixture warm.
Using an ice cream scoop or tablespoon, drop small mounds of the peanut mixture onto the parchment paper.
After all the mixture has been used, rinse the crock with hot water for easy cleanup.
Let the peanut clusters set for about an hour until firm.
Once set, transfer them to an airtight container.
These clusters stay fresh for about a week and make great gifts!