Lara Mason, from nearby Brownhills, spent more than 250 hours crafting the cake, which weighs in at nearly 20 stone, ahead of May’s royal wedding.
It is among several pieces on display at Cake International at the National Exhibition Centre.
The cake, which was made from 300 eggs and 50kg of fondant icing, was covered with chocolate ganache with everything edible apart from the frames.
Ms Mason is no stranger to baking royals, having made a replica of Prince George in the past.
She said the cake is enough to feed 500 people.