Noah's Ark 3D Cake Everything in this picture is edible except the animals. I was trying to make my own animals but I just didn't have enough time. Ark is made from a marble cake and covered in fondant. The ramp is white chocolate. The water is blue butter cream. The sand is yellow/brown sugar. The pebbles and big rocks you see are all edible and purchased from a bulk food store. It was a huge hit at the party.