Stacked cakes, such as wedding cakes, are created when different-sized cakes are placed directly on top of one another. Stacked cakes and cakes with columns or tiers can be very dramatic and beautiful but, certainly, require a firm foundation and the correct accessories for success. A multi-tiered cake without the proper foundation is doomed, most likely resulting in ruined decorations, uneven layers, and potentially a completely collapsed confection.
Creating a stable foundation out of dowels for the cake is not difficult. You can use either wood or plastic dowels depending on what is available or your preference. A good rule of thumb is to use 1 dowel for every 2 inches of cake. For example, a 16-inch or 18-inch cake will require at least 8 dowels and a 10-inch cake will need at least 6 dowels.