Line a baking sheet with parchment paper and set aside.
Place the orange candy melts in a microwave safe bowl. Heat in 25 second intervals, stirring after each interval, until melted and smooth.
Dip each side (long side) of the nutter butter cookie into the orange candy melts and then carefully shake the cookie to get rid of any excess candy melts. Then dip the bottom of the cookie into the orange candy melts and carefully shake the cookie to get rid of any excess candy melts to form the beard of the leprechaun. Set the cookie on the prepared baking sheet to cool. Continue this process until 24 cookies are coated with the orange beard. Make sure that the orange candy melts are dried on the cookies before proceeding with the next steps.
Place the green candy melts in a microwave safe bowl. Heat in 25 second intervals, stirring after each interval, until melted and smooth.
Dip the opposite end of the nutter butter cookies into the green candy melts and carefully shake to get rid of any excess candy melts to form the hat of the leprechaun. Then place the cookie back on the baking sheet to cool. Continue this process with all the cookies. Make sure that the green candy melts are dried on the cookies before proceeding with the next steps.
Use the black decorating icing to add a line on the bottom of the green part of the cookies to create the hat’s rim. Then carefully add a shamrock sprinkle to the center of the line for decoration on the hat.
Use the remaining black decorating icing as glue to add on the eyes of the leprechaun and the orange sprinkles as the nose.
Place the cookies back on the baking sheet to allow the finishing touches to cool. Then they are ready to serve and enjoy!