Sponsored by Hotpoint | There are few things as joyous as the smell of a baking sponge cake. This indulgent treat makes wonderful warm aromas that fill a kitchen and waft throughout the house, recalling memories of special occasions like weddings and birthday parties. Cupcake Jemma shares her Ultimate Sponge Cake recipe to serve 24 friends, in high-definition 2K with some fantastic tips, that will ensure the perfect sponge cake every time.