A method of making a clear beverage concentrate, which contains a nanoemulsion of a liquid flavour oil in an aqueous phase, including the emulsification of the flavour oil into water in the presence of an emulsifier, which emulsifier consists of at least 5% by weight Quillaja saponins, optionally containing at least one other emulsifier, characterised in that, prior to emulsification, the pH of the aqueous phase is adjusted to 4.0 maximum. The method allows the preparation of beverages that not only are crystal-clear, but which also have substantially more of the full flavour of the original flavour oil.