Pipe a 1/2-inch-tall border of icing around edge of first cake layer. Spoon half of chocolate mousse (about 2 cups) onto center of cake, and spread evenly within border using a small offset spatula.
Fear not, Slimming World has a quick and tasty chocolate cake recipe that also aids in weight loss. Dubbed as 'gorgeously gooey', this slice is fluffy, rich, and packed with chocolatey goodness ...