How do I make a cupcake cake? They put all the cupcakes together and ice them all as one whole cake. But how do I make it look so nice, like a sheet cake?

here is a tutorial on making a ccc.

http://home-and-garden.webshots.com/album/105830324epGFhn

Everything you ever wanted to know about cupcake cakes:

http://forum.cakecentral.com/cake-decorating-ftopict-57413-.html
(Has tutorials, how to frost & how to fill threads.)

HTH