jaapv
RFF Sponsoring Member.
The point about roasting is well taken, but it presupposes acces to a considerable number of coffee varieties to achieve the right blend. For instance, espresso coffee consists of a number Arabica varieties, mainly high (i.e. grown above 1500 metres) with some Robusta strains mixed in to get the right acidity and crema. Coffee traders employ special teams of tasters to monitor their stocks and blend for their signature taste. I know, my grandfather was a coffeetrader and my late mother did a lot of coffee tasting in her youth. Fortunately most coffeebeans are packed under nitrogen within minutes of roasting and will keep their aroma for months or even years.