Marble Cake in the Thermomix My Way Of Cooking cookbook. I used carob powder instead of cocoa powder. Hopper blue colour (coloured from fruit and veg purchased from Allergy train) for the butter cream icing. Hopper green and pink for the marshmallow fondant icing to make the sea weed. Biscuits crumbed in the Thermomix for the sand. Ariel, crab, turtle and shells all decorations.