You will notice that the recipe makes 3 cakes. You can certainly use all of them, but I personally like to keep it to 2 for simplicity and to not make it so overwhelming for the baby. You can also do just one layer but having two will give the cake some height for the pictures. If there's an older sibling, you can use the extra cake (if not using all of them) to make a mini cake for them as well. My son oftentimes gets jealous of his sister, so I purposefully developed this recipe with him in mind.