Flavour-active compounds contribute significantly in the organoleptic properties of many food products. In terms of value, the flavour market accounts for more than 50% of the global mar- ket for flavours and fragrances, which is expected to grow from US$ 21.4 billion in 2013 to US$ 25 billion in 2018 [1]. Nowadays, most flavours are either extracted from plant sources or synthe- sized by chemical means. The rising concern of consumers about natural products and the requirement for eco-friendly processes definitely encourage research and development of alternative pro- cesses for flavour synthesis via biotechnology. This aspect has been strengthened by the latest EC legislation [2], according to which natural flavours include biotechnology-derived products based on microorganisms, plant cell cultures and enzymes [3–6].