Karisha wants to surprise her best friend with a cake based on the things she loves best, so she plans a make-up box cake packed with edible cosmetics and a sweet side of fried chicken. Built from vanilla sponge and iced shortbread biscuits, it comes complete with a gum paste figurine of the birthday girl herself sat on an ornate throne. Nastassja tackles a surprise birthday cake that must look like a concrete sculpture and match the masculine theme of the party. Standing almost three feet tall, Nastassja's royal blue and gold concrete puzzle cake has a deeply carved geometric pattern. Rosie faces a career first as she combines sugar craft skills and technology in the form of projection mapping. Commissioned for a garden centre group's annual awards night, Rosie's huge cake hides two surprises, as its ornate architecturally decorated front spins to reveal a secret water garden, that comes to life as projection mapping makes it look as if water and diamonds are sparkling down the cake.