I have used the Williams Sonoma stormtrooper cookie cutter in other ways. Here I used it as a pattern to create a TK image on a large chocolate chip cookie. Just press the cutter onto the surface to make a pattern, and decorate as noted in the prior post.
Note - my son wanted a big chocolate chip cookie "cake" - but one cookie wasn't big enough, so I made 2 and just joined them. Easy way to extend the quantity.