Blending requires exceptional skill, knowledge, and a well-educated nose.
Master blenders combine ports from different years and various quintas to create a certain taste.
They may use a few different ports or a great many, to give the wine the desired flavour, aroma, texture and complexity.
It is not only the blending of ports that creates the desired taste.
The "flavours" of the different barrels can change the taste and
characteristics of the finished port wine. Master blenders regularly line
up empty casks in the cellars and inhale the aroma from each one.
Some used port barrels are shipped to Scotland where they are used to
age scotch whiskey and add their sweet flavour to the finished product.