How do I make a 12 layer chocolate cake and vanilla frosting?

You know, the frosting that doesn't come out of a can.How do I make a 12 layer chocolate cake and vanilla frosting?
frosting-





4 boxes of powdered sugar


milk


1 cup unsalted butter or canned crisco/lard


cake decorators vanila (not brown)





mix butter and and mix one box of sugar at a time . Add vanila and sprinkle in milk little at a timeHow do I make a 12 layer chocolate cake and vanilla frosting?
Find a good frosting recipe at allrecipes.com


Wow! 12 layers? I guess you best get baking!