What is a Wilton Wedding Cake ? The term wilton wedding cake refers to the structure of the wedding cake itself. Notice how the above cake has a structure that resembles a building. The pillars make the cake look very majestic and grand. Many people choose their cakes to have this design simply because it has a very good look.Wilton wedding cakes are often seen at formal evening weddings, and higher class weddings. Having this kind of cake design at your wedding will definitely show your guests that your wedding is seirous!