One of my daughter's closest friends graduated from UNC-Chapel Hill last weekend with a degree in (you guessed it) Geology! This cake was a surprise for her after the ceremony. There's a chocolate cake with mocha buttercream under that big pile of rocks. And, speaking of rocks, they are made of cake truffles covered in fondant. I crumbled a whole chocolate cake and mixed it with buttercream to make "cake dough" that I used to mold into rock shapes... sooo yummy!