The term 'Wedding Cake Layer' is often used to refer to a TIER of a wedding cake. A TIER is a layer of the cake, usually separated by a layer of frosting or other material. Wedding cakes are traditionally multi-tiered and can be made from a variety of materials, including fondant, buttercream, and marzipan. The tiers of a wedding cake can be decorated with a variety of designs, such as flowers, ribbons, and other decorations.