Locate a picture of Iron Man's Mask. Print the mask in color with several small images of it. Place it on a cookie sheet.
Tape wax paper, over the photo of the masks, to the cookie sheet.
Using a small pastry bag filled with the red royal icing and a #2 tip, start outlining the mask.
Fill in the outline of the mask following the printed example with the red icing. Allow this to dry for 30 seconds to prevent the colors from bleeding.
Using a small pastry bag filled with the white royal icing and a #2 tip, fill in the eyes on the mask with the white icing. Allow this to dry for 30 seconds.
Using a small pastry bag filled with the golden yellow royal icing and a #2 tip, start by outlining the inner part of the mask. Fill in the outline of the inner mask with the golden yellow icing. Allow this to dry for several minutes.
Following the picture use the Wilton Foodwriter to make the black marks on the mask, and allow to dry for 5-10 hours.
To ensure the mask is dry, gently touch one of them with your finger. If it allows you to push in on the icing, give it a little more time to dry. If the mask is dry, it will feel hard to the touch.
Cut the wax paper holding the completed masks into squares surrounding the completed design.
Once the masks are dry, carefully peel the wax paper off of the back of the images and place on the frosted cupcake.