travel.usatoday.com — St. Louis Willman says most anyone in his hometown of St. Louis knows that Jilly's is the place to go for cupcakes. He swears by the Reese's Chunkage, a half-pound treat filled with peanut butter mousse and chocolate fudge ganache, topped with peanut butter and chocolate butter cream, and finished with chunks of Reese's Peanut Butter Cups.