When did cupcakes become the new big thing? (I guess I'm behind the times!) Pittsburgh is a small to medium-size retail market yet it boasts not one but two cupcake "cafes"-- CoCo Cupcake Cafe in Shadyside and Dozen Cupcakes in Squirrel Hill. The two pictured above are from CoCo Cupcakes -- the one on the right is a flavor of the day "lavender" and has been devoured despite having only a mild