2. Punch a hole in each cake board right in the center with an apple corer, then wrap it in saran wrap. This prevents any soggy, wilting, tilting boards and allows you to easily put a small dowel straight down the center of your cake after the layers are stacked. 3. In each tier that you stack on, use at least 4 supports in the tier that are the EXACTLY the same height, Regular drinking straws work perfectly.