Shiraz/Cabernet (or Cabernet/Shiraz, depending on which is the dominant variety) can be described as Australia's archetypal red wine blend. The blend can trace its roots back to 1865, when the famous Dr Guyot recommended it for the sunbaked vineyards of Provence. It became popular in the early 1960s and 1970s and came about largely due to the high demand for red wines and that fact there there was not enough Cabernet Sauvignon to meet this. At this time Shiraz was widely regarded as inferior to Cabernet Sauvignon and was still being grubbed up in Australian vineyards up until the mid 1980s.
The fleshiness and richness of Australian Shiraz acts as perfect foil for the more tannic and angular Cabernet Sauvignon and the blend is often matured in American oak, which adds notes of vanilla and spice. The proportions in the blend vary from 50/50 to 80/20 in some cases. It is seen across the whole quality spectrum in Australia and the blend is now been used in Languedoc Roussillon in France as well as in South Africa and California.