Well, I was spending some time at a friend's house recently and found myself with perhaps too much chocolate in my system and no activities planned one day. So, obviously, I decided I had to make a cube cake. Various decorating ideas were proposed - mazes on the sides, dice spots, a Borg cube - but I settled on a good old Rubiks. We be nerds.
As far as materials... I used one tub of chocolate icing, three of vanilla, some food coloring, and four boxes of white cake mix. I made four 9x9 cakes, layered them on top of each other, then measured and cut it down so that it was a cube. Well, the sides slanted a bit, but it was pretty close. I think it only would have taken two or three boxes of mix if I had a pan that was closer to the width it ended up being. So yes, there was much spare cake and almost as much spare icing, and both were consumed by my friends. In an effort to be helpful, they would have me believe.
I marked off where I was going to cut with red icing and a chopstick. The cake was wonderfully wiggly before I iced it, and I decided my next project is an edible Gelatinous Cube, complete with bones and armor and such inside. I'm not sure how I'll do that yet. (God I'm such a nerd. Rubiks cube, Borg, Mazes, D&D in one post. Ye gods.)
Me painting it, again, mostly with chopsticks. Took an age, hurt my knees.
And the finished product, from two angles so you can tell I did it all the way around:
It wasn't eaten until after I left, but they apparently cut out the pieces as cubes, as I'd hoped they would.
Hope you like it.