To make this modern Marble Buttercream Cake you'll need to make two small bowls of grey buttercream; one is light, and one is a medium shade. Then you'll take a little of each color (white, light grey and medium grey) onto your offset spatula. Gently spread the buttercream onto a piece of clear acetate or wax paper. The barely mixed buttercreams will be the different shades you typically find in real marble stone. And because of the randomness, it'll look more authentic! Click the link in