It was first, it is the best, and now Chicago's got it. It has come to this editor's attention that there are more than a few Chicagoans still unfamiliar with the treat heard 'round the world. Born in Los Angeles, Sprinkles Cupcakes is the reason for all cupcake bakery progeny. Only those who know Sprinkles understand that this isn't just some trend. It's a revolution. Get immediately on the Red Line, or the 66 Bus. Locate Sprinkles Cupcakes at Walton and Rush streets. Purchase red velvet cupcake with cream cheese frosting. Insert into mouth. Tell us we were right. Sprinkles Cupcakes, 50 East Walton Street; (312) 573-1600.