Various companies have had fabrics in recent years that had cupcakes or sundaes or or birthday cakes. Here are some I scared up (I have not dealt with any of these sellers).
http://www.jandofabrics.com/Fabric.a...FWhjTAod-1wA7w
http://www.ebay.com/sch/i.html?_nkw=cupcake+fabric
http://www.ebay.com/sch/i.html?_odkw...abric&_sacat=0
You could incorporate some fussy cuts into almost any kind of a block. Or maybe you could create some 3 dimensional cakes with trapunto quilting, such as a fluted cupcake paper, swirled icing, and a cherry on top. Or maybe you could make something like an attic windows design that is a bakery window with kids looking in. It seems like a fun project. Hope you enjoy it.