Melt chocolate chips in microwave for 30 seconds and then stir to smooth. Continue at 15 second intervals as needed.
Transfer melted chocolate to a Ziploc bag and snip off one corner of bag.
Lay a shortbread cookie flat on worksurface with stripes facing vertically.
Squeeze melted chocolate to pipe a line across the bottom of each cookie. The line will cross over each of the vertical stripes.
Place long side of graham cracker along the line of melted chocolate. Hold until chocolate begins to set.
Repeat for remaining cookies and then let them set for 30 minutes.
If necessary, reheat chocolate in microwave for 10-30 seconds until it's smooth again.
Pipe about 1/2 teaspoon of melted chocolate along the wider side of 1 peanut butter cup.
Place peanut butter cup centered over the hole of the shortbread cookie. Repeat with remaining peanut butter cups and cookies.
Squeeze about 1/2 teaspoon of chocolate on the bottom of caramel and place on top of the peanut butter cup. Repeat with remaining caramels and then let set for 15 minutes.
Turn cookie so that the graham cracker is flat on the work surface and the shortbread cookie is upright.
Pipe a small amount of chocolate on one side of a candy corn and place against peanut butter cup for beak. Hold for a minute until chocolate sets and then repeat for remaining cookies.
Pipe a small amount of chocolate on one side of two more candy corns and place them on either side of peanut butter cup and caramels for legs. Repeat for remaining cookies.
Using black decorating gel, add eyes on each candy corn beak. Let cookies set for 1 hour.
Notes
Use melted chocolate for eyes if you don't have black decorating gel.
You can place chocolate chips in Ziploc to microwave if you prefer. I don't like microwaving plastic so I prefer to melt in a glass container and then transfer to a Ziploc bag, or piping bag.
You can use regular chocolate chips instead of mini, it will just take longer to melt in the microwave. Start with 1 minute and continue with 30 second intervals.