Cake baker extraordinaire, Zilly Rosen has created a double portrait of Obama and Lincoln in the Smithsonian American Art Museum. Her medium was cupcakes. Details of the process are discussed at the Obama Foodorama blog.
Using a grid technique technique much like the great Chuck Close, Ms Rosen and her minions arranged more than 5,900 vanilla cupcakes to recreate a photo of Obama by Annie Leibowitz and another of Lincoln by Alexander Gardener.
The installation is temporary, and the cupcakes are likely already eaten as I type this.
Here's a video of the process:
Online video chat by Ustream