According to Cupcakes Take the Cake (via Grub Street Chicago), Chiacgo-based More Cupcakes had created the most expensive cupcake ever -- the $75 White Truffle Cupcake!
This cupcake is made with white truffle-infused cake and is topped with bacon frosting and shaved fresh white truffles. Who would buy this? It doesn't even sound good.
(By the way, have you ever seen what a real white truffle looks like? I googled it.)