Eloise aims to bring back happy memories with a 1940s themed 90th birthday cake. Molly attempts an edible coral reef, her most detailed design to date, and Nastassja realises a baker's nightmare when she makes a completely shattered cake.

Cake boundaries are stretched as Michelle tackles three illuminated jellyfish cakes; Nastassja creates long stemmed roses for a cake with more than 300 petals on it; and Karisha channels her inner princess and superhero for a birthday cake of two halves.