I just learned a friend of my sister-in-law owns Chicago Cupcake.

No shop, just a food truck and you can order online and they deliver.

http://www.chicagocupcake.com/

I guess they are different than your traditional cupcake, with a crust and more of a mousse texture than cake.

http://chicago.seriouseats.com/2012/...ake-truck.html

http://www.chicagobites.com/tag/brendan-bolger