To make the cupcakes
1-Preheat the oven to 350°F: Preheat the oven to 350°F. Line a muffin tin with paper liners. Set aside.
2-Prepare the chocolate cake mix according to: Prepare the chocolate cake mix according to the instructions on the box and then spoon the batter into the prepared muffin tin filling each liner about ½ of the way full.
3-Place one Reese’s mini cup into the: Place one Reese’s mini cup into the center of each one and gently press in place into the batter.
4-Bake for 16 minutes and then remove: Bake for 16 minutes and then remove from the oven and allow the cupcakes to cool completely in the tin.

To make the frosting
5-Meanwhile, in a large mixing bowl, cream: Meanwhile, in a large mixing bowl, cream together the butter and peanut butter until well combined.
6-Then mix in the confectioners’ sugar a: Then mix in the confectioners’ sugar a little at a time. Add one tablespoon of milk at a time, as needed, if the frosting is becoming too thick as you mix the sugar in.
7-Once you have the right consistency, transfer: Once you have the right consistency, transfer the frosting into a piping bag and pipe it onto each cupcake.
8-Chop the remaining mini Reese’s cups to: Chop the remaining mini Reese’s cups to garnish the cupcakes with. Serve and enjoy!