This week I used my teeny home kitchen to make an eyeball cake for an ophthalmologist friend's birthday. It's the first spherical cake I've made to this scale; not so difficult to build but pretty stressful to cover in fondant. Fondant stretches beautifully, but tends to pleat and wrinkle when covering a contracting shape, like the underside of an eyeball. The cake measured about 12 inches high so there was a lot of fondant to tame.
The veins are piped in royal icing and the iris painted with luster dust and lemon extract. I also have the optic nerve coming out the back and curving around front to spell "happy birthday." Much to my delight, the birthday boy wore his surgical scrubs to cut the cake!