In a machine bowl fitted with a paddle, add the egg and Macphie Chocolate Crème Cake Mix and beat for 1 minute on slow speed and 3 minutes on medium speed.
Add the oil and water and mix for 1 minute on slow speed. Scrape down and mix for a further 3 minutes on slow speed.
Deposit as required and bake at 180°C for 40-50 minutes (between 4-5kg for 18inch x 30inch sheets).
When cooked and cool, cut the crème cake into 1 inch thick slabs and sandwich a layer of Macphie Chocolate Frosting between the layers.