Preheat oven to 350 degrees and line a cupcake pan with cupcake liners

In a large mixing bowl, combine the cake mix, butter, milk and eggs

Once combined, add in the peanut butter and mix until fully combined

Bake in the oven for 21 minutes

Let cool for 10 minutes

Using a standing mixer, beat together all ingredients until combined and smooth.

Continue to beat until stiff peaks form

Once done, scoop into the piping bag

Place a few nutterbutter cookies into the ziplock bag and crush using a rolling pin

Pipe the frosting onto the cooled cupcakes

Sprinkle crushed cookies on top of the frosting

Place a cookie into the center of the frosting

Enjoy