This has got to be the best Mario cake ever! Created by Su Yin of The Journal of a Girl who Loves to Cook blog. It took her two weeks to brainstorm and 3 days to make the cake.
Link (including photos from the various stages of the cake making process) - via 13 Geeky Baked Goods post from Geek Crafts
Seriously, they don't taste like anything, and they hurt my teeth!
Also I love the geeky wedding cake! That would be so cool to have a themed cake like that ^_^