I started by baking the cake in 6 inch and 9 inch cake pans. Sometimes I make the cake from scratch...not this time. Boxed mixes work great and they are huge time savers. One tip: let the eggs sit out a bit before you add them to the mix.
After the cakes have all baked and cooled, wrap them in seran wrap and put them in the freezer. I usually bake the cakes a few days before. It's easier for me to spread out the process. Once the cake is frozen, you'll need to level it. You can use a cake leveler (you can get them at any craft store...walmart even sells them) or you can just eyeball it.
I wrapped and froze the leveled cakes because I didn't have time to do more. You don't really need to freeze them again after leveling though.
This is the crumb layer - see how you can see the cake through bits of it? I didn't take a picture of the fully frosted cake.
Now it's fondant time. Wilton sells fondant. You can get it at any craft store (or again, walmart). You can totally use store-bought fondant. It's convenient and super smooth and really white. And it tastes gross. I've used it and it's great, but I prefer using homemade fondant. It's much cheaper and tastes much better. There are recipes and tutorials all over the internet. I might post a making fondant tutorial sometime...but seriously they're everywhere.
After you make your fondant, you can color it. For this cake, I wanted soft pink, hot pink, and purple. I use wilton gel to color fondant. It's a lot brighter and bolder than just food coloring. But you can use food coloring if you like. It works too. For the soft pink, I used hardly any pink gel. I used more for the hot pink. And then I mixed pink and blue gel to get the purple I wanted. It kind of looks greyish in the pictures, it's not...promise. To mix your colors, twist and knead the fondant until the color is even. Before:
After:
I sometimes wear gloves (latex and powder free, food handling gloves) to dye the fondant - just because I don't want pink and blue hands all day.
Roll out your fondant and then lay it over the cake. Try to keep it smooth.
Cut off the excess. I use a pizza cutter.