Twist off the top of the Oreo cookie so you have one side with just chocolate cookie and another side with the filling. Arrange them on a tray in front of you.
Pipe a small line of frosting across the top of the filling. Arrange 4 candy corn, with the white part place in the line of frosting. Pipe another line of frosting over the top of the white part of the candy corn. Put the top of the cookie back in place and gently press down just so te frosting touches and can harden in place.
Unwrap your peanut butter cups, place a little bit of frosting onto the base of the peanut butter cup and place into the bottom center of the Oreo cookie.
Pipe the tiniest dot of frosting onto the peanut butter cups where the eyes should go, and gently press them into place.
You can use frosting or melted chocolate for the "beak" Dip the red M&M into the frosting or melted chocolate and place on the peanut butter cup. Press gently and hold for a minute for it to start to harden.
Place in the fridge for the cookies to set up for 15-20 minutes.