Decorating and Construction Supplies
You're going to need specialized supplies depending on the type of cake you're planning to bake. For a tiered cake with several layers, for example, you'll need parchment paper to help bake and move the various pieces, cardboard to separate each tier and multiple skewers to keep everything in place.
You can also purchase frosting bags and cake decorating kits to help you artfully craft and design your cakes. After all, if you're going to the trouble of baking a fancy recipe, you might as well go the whole nine yards with some decorative icing and creative designs. Just scrawling "Congratulations" or "Happy Birthday" on a cake ups the ante when it comes to presentation.