With 3D cake decorating, you can create a multitude of different shapes, characters and objects for a customised cake. Making a skateboard shaped cake is a simple process so even a novice baker can feel confident that she can create an edible party centrepiece in just a few steps. This cake is a "wheels up" version, showing the underside, which is where the design is painted on real skateboards.
Prepare two chocolate or vanilla cake mixes according to directions on the box. Pour the batter into two 13-inch by 9-inch rectangular baking pans. Bake according to the instructions and remove the cakes from the oven. Allow the cakes to cool in the baking pans for three to four hours at room temperature.
Remove one of the cakes from the baking pans and place it on a rectangular plastic cake tray. Use a serrated knife to remove any unevenness on the top of the cake. Spread butter cream or regular store bought icing on the top and place the second cake on top of the first.
Use the serrated knife to round the corners of the cakes. Continue shaping the cake with the knife by trimming the sides in a slight hourglass shape. The middle of the cake on each side should curve in approximately one inch in comparison to the corners.
Squeeze a few drops of food colouring into a bowl of butter cream icing to make the cake the colour of your choice. To make black icing, use a concentrated black food colouring powder in chocolate butter cream icing. Spread a thick layer of butter cream icing on the entire cake. Put the cake in the refrigerator to allow the icing to firm for 30 minutes. Remove the cake and spread another layer of icing on the cake.
Decorate the cake with a skateboard logo or simple design element that would appeal to skateboarders. For instance, mix some yellow food colouring into white butter cream icing and use a pastry bag and round icing tip to pipe a lightning bolt across the middle section of the cake.
Connect two chocolate cream-filled cookies together by spreading icing on one cookie and placing the other cookie on top of the icing. Repeat this step three times to make the skateboard wheels.
Place one set of wheels on the cake, cover both ends of a rolled wafer cookie with icing and attach one end to the cookie wheel. Attach another cookie wheel to the other end of the rolled wafer cookie. Repeat this step to put the other set of wheels on the cake.