In a small mixing bowl, combine the peanut butter and butter together with a mixer until smooth. Add the powdered sugar and mix well (mixture will be rather thick).
Line a baking sheet with parchment paper so you have somewhere to put your treats for them to dry. Use a scoop or spoon to scoop about 1 teaspoon of mixture onto the top of a pretzel. Place another pretzel on top to make a sandwich - spread peanut butter if needed.
Do this until all the peanut butter mixture is used.
Transfer your tray to the freezer and freeze treats for approximately 30 minutes.
When you’re ready to dip the treats, heat 4 ounces of almond bark/melting chocolate in a microwave-safe bowl in 20 second increments (stirring between).
Once smooth, remove about half of the treats from the freezer and dip the treats halfway into the almond bark.
Place back on the baking sheet and let them cool completely.
Once the almond bark is gone, heat the other 4 ounces and repeat process.
After all pretzels have been dipped and the first layer is hardened, drizzle remaining almond bark over treats with a fork (use the other 2 ounces if needed).
Drizzle a few at a time and top with sprinkles - work quickly before the almond bark cools so that the sprinkles stick.
Let the treats cool completely, about 15 minutes.
Package the treats up for friends and family or serve them on a plate. Enjoy!