How can I stack cake tiers to create a multi-tiered cake?

To stack cake tiers and create a multi-tiered cake, you will need to use dowel rods or cake pillars to support each tier. Place the largest tier on the bottom, then add a layer of frosting or ganache before adding the next tier on top. Repeat this process for each tier, making sure to secure them in place with the dowels or pillars. Finish by decorating the cake as desired.