To make this Darth Vader cake topper I used the Superhero templates. In the 'TEMPLATES' tab below, you'll find additional templates and tips.
HEAD & FACE
Make the head the same way as in the Superhero' tutorial, but don't make the chin cutout. Stick the mouth first and then the eyes. 

HELMET
Roll out the paste to about 1-2 mm. Cut out the helmet parts (see templates). For tips on how to roll out the paste so that it doesn’t move when cutting, go to step 131 of the Superhero’ tutorial

First stick the front part of the helmet. 
Stick the back part of the helmet after you attach the head.

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