Here's some ideas of what your cake can be made of.
Custom flavors are also available...

Cake Flavors White Yellow Marble Chocolate German Chocolate Red Velvet Carrot Spice	Cake Fillings Strawberry Preserves Raspberry Preserves Strawberry Cream Raspberry Cream Cream Cheese Chocolate Coconut Pecan Bavarian Cream
Cake Frostings Buttercream Chocolate Buttercream Whipped Cream Chocolate Whipped Cream Rolled Fondant