Layer Ingredients in the Crockpot: Add the white almond bark, chocolate almond bark, semi-sweet chocolate chips, and peanut butter chips into the crockpot. Top with the peanuts (and pretzel pieces if using).

Cook on Low: Set your crockpot to low and cook for 1-2 hours, stirring every 20-30 minutes, until everything is melted and smooth. Be careful not to overcook, as the chocolate can burn if left too long without stirring.

Combine and Mix: Once everything is melted, stir well to combine all the ingredients into a smooth mixture.

Form Clusters: Line a baking sheet with parchment paper or wax paper. Use a spoon to drop spoonfuls of the mixture onto the prepared baking sheet, forming small clusters.

Add Sprinkles: While the clusters are still warm, sprinkle with holiday sprinkles if desired.

Cool and Set: Allow the clusters to cool and harden at room temperature for about 1 hour, or place them in the refrigerator for faster setting.