Peppermint Flavour Mousse with Crackling Chocolate Layers. Enjoy crackling layers of milk chocolate and smooth peppermint-flavoured bubbles together for a unique and delicious contrast of textures. Chocolatey and creamy, indulge yourself with After Eight Chocolate Peppermint Mousse for a special lunchtime, snack or evening treat. Made with 63% milk. No artificial colours or preservatives.. After Eight.