Prepare baking sheets with silicone mats or parchment paper.

Add butter to the bottom of the crock pot. Add peanuts, white almond bark, milk chocolate chips, semi-sweet chocolate chips, and peanut butter.

Turn crock pot on high. Stir after 20 minutes. Turn crock pot down to low and allow to cook for an additional 30 minutes.

Stir until all chocolate is melted and ingredients are well combined. If chocolate still isn’t fully melted allow to cook for an additional 10 minutes, check in 5 minutes intervals and stir each time. Careful to not let the chocolate overcook and burn.

Once all chocolate is melted, add lightly crushed pretzels, stir to combine. Turn off crock pot.

Using a 2 tablespoon cookie scoop, scoop clusters on to cookie sheets or parchment paper. Allow to set until hardened, about an 60 to 90 minutes.

In a microwave safe bowl, add remaining white chocolate chips (or white almond bark) and melt in 30 second intervals, stirring well after each pass. This should take between 60-90 second depending on the strength of the microwave.

Pour white chocolate into a sandwich size ziplock bag, gently press the air out of the bag while sealing. Cut a small corner off the bag and drizzle the white chocolate over the clusters.

Top with festive sprinkles, if desired, and allow to cool for another 30-60 minutes before serving or packaging.