I was inspired by the circuit board designs on this site, and made this cake for my fiance’s birthday. He builds high-end audio as a hobby, and I based the design of the cake on a circuit board that he recently designed (seen in the picture in front of the cake).
I baked several sheet pans of sponge cake, and cut out six rectangular pieces to cover the bottom and sides of a rectangular spring form cake pan (these formed the “walls” of the cake). I filled the pan with chocolate/raspberry mousse, and placed a piece of sponge cake on top to close the cake.
After letting the cake set overnight, I brushed the cake with strained apricot jam and covered the cake with a thin layer of marzipan. I then brushed the marzipan with gin, and covered it with green-colored sugar paste. I modeled the various electronic components out of colored sugar paste, and attached them to the sugar paste using royal icing. Lines were piped with colored royal icing, and the wires on both sides were licorice.