I made the cakes one day ahead and after they were completely cooled I refrigerated them over night (as my mom says, it is much easier to work with the cake after it has rested a day).
Enjoy the pictures and happy baking!
Bake your cakes, let them rest then fill the middle... I used "Dulce de Leche" this is the typical Argentine cake filling! It is delicious...if you can't get your hands on real Dulce de Leche from Argentina, you can get an impostor from any grocery store, look at the sweet and condensed milk section and Nestle now make a can called Dulce de Leche
Fill the cakes....
Use butter-cream frosting... make the cake it as smooth and even as possible...
I used plastic dowel rods to support the weight of the other cakes, you can cut them to size easily with a kitchen knife and place them in the cake...
Roll the fondant out, measure the diameter and add the two sides, if you've never used fondant, watch this YouTube video to learn how...
Then start designing your masterpiece!