Water-based, post-foaming cosmetic cleanser preparation, suitable for dispensing from an aerosol container, containing in a conventional aqueous base preparation, a) detergent surfactants with saturated groups, preferably anionic surfactants and nonionic surfactants and/or amphoteric surfactants, b) 2.5 to 25% by volume, preferably 5 to 20% by volume and particularly 7.5 to 15% by volume, of pure oxygen.