"The King of the Red Varieties," as it is often called, the Cabernet Sauvignon variety has an extremely interesting flavour, at least for me. This is the scent of a green pepper, and it distinguishes the wines from this variety.
Some wines happen to have an extremely pronounced aroma and a taste of pepper, which may not be favourite to everyone, and in others it is very slight to detect and it harmoniously combines with other flavours. You have probably started to ask yourself, "Where does the smell of pepper come from?" The flavouring substances in wines generally can be derived from the grapes themselves, to be created during the process of fermentation, or formed by non-smelly substances as a result of one or another treatment of the wine. In addition, they can also be adopted as a result of storage or aging of the wine.
There is a group of flavouring substances - pyrazines that originate from the metabolism of amino acids, these substances contain nitrogen and they are the ones to give that scent of a green pepper. They have a plant smell and even nuances of earth and soil. One of the representatives of this group of flavouring substances – methoxy-isobutyl-pyrazine was found in many plants such as green pepper and peas, potatoes, but it also found in Cabernet Sauvignon grapes. These substances are found in grape skins and their concentration drastically decreases after grapes have begun to change their colour. As has already been said, some wines feature a sharper flavour, these are pressed wines, and those obtained by self-drip gravity caused have a slighter and unobtrusive flavour. The terroir is of great importance for the presence of pyrazines and their participation in the formation of the bouquet. For example, Californian wines are more characteristic of this plant aroma, while French wines have more of a scent of black berries and quite subtle green-grass-like notes.
And for yourself you can make a comparison between different Bulgarian and foreign, pure varietal wines produced in different cellars/wineries, considering their location and the technologies used.