In a medium mixing bowl, add the softened butter and peanut butter. Using a stand mixer or hand mixer, mix on medium speed until combined.
Add the graham cracker crumbs and confectioners’ sugar. Mix on medium speed until combined. The mixture should be crumbly.
Add the milk and mix to incorporate. The mixture should be thick and no longer crumbly.
Line a baking sheet with parchment paper.
Using your hands, take about 1 tbsp of dough and roll it into a ball. Lay the ball on the prepared baking sheet and repeat with the remaining dough.
Place the dough balls in the freezer to harden for 15 minutes.
Melt the chocolate chips in a small saucepan on low, or a microwave-safe bowl in 30-second intervals, stirring in between, until smooth.
Remove the dough balls from the freezer. Working one dough ball at a time, dip the ball in the melted chocolate. Use a fork to move the ball around, ensuring it's fully coated. Lift the ball with the fork and gently tap it against the side of the bowl to remove excess chocolate. Transfer back to the baking sheet and repeat with the remaining dough balls.
Place the baking sheet back in the freezer for 10 minutes to allow the chocolate to harden.
(Optional) Melt the white melting wafers in a small saucepan or the microwave until smooth. Drizzle the melted wafers onto the chocolate-covered peanut butter balls using a piping bag or a spoon. Set aside for 5 minutes to harden.
Once the chocolate has hardened, enjoy!
Notes
Use semi-sweet chocolate chips instead of milk chocolate chips for a less sweet treat.Store peanut butter balls in an airtight container in the fridge for up to 2 weeks or freeze for up to 3 months.