How can something this simple look so special? A basic vanilla cake staple, which every baker must have in their locker, is turned into a mystery surprise with a little creative colouring. Mystery or played straight, this bake is super moist and fluffy and lends itself to any sort of decoration. Eat it on its own, or ice it, or cover it with buttercream, jam, chocolate, lemon - the only limit is your imagination with this most versatile sponge.