A coffee grinder is a must have for anyone who loves coffee, for tow simple reasons: freshness and control over the coarseness of the grind.
Freshness
To keep coffee as fresh as possible you need to minimize it's contact with air. Air is one of coffees worst enemies as it destroys delicate flavors by turning the natural oils present in coffee rancid.
If you have a coffee grinder at home you can grind your coffee beans as you need them.This preserves their freshness, as a whole coffee bean has a much smaller surface area than that of a ground bean and therefore is less exposed to air.
The actual process of grinding releases many of the coffees aromatics; as you grind you can smell this in the air.If you don't quickly use these grounds then you are going to lose this aroma and deprive your cup of valuable flavors.This is another good reason to only grind coffee on demand.
Control Over The Coarseness Of Grind
Different coffee makers require a different coarseness of ground coffee. For example: an espresso machine, witch has a short brewing time (less than 30 sec.),needs a very fine powder-like grind; whereas a cafetiere, which has a long brewing time (3-4 min.), needs a much coarser grind. With your own coffee grinder you get to control the coarseness of the grind as you can adjust the grinders settings. So if you find your coffee taste bitter, a result of over-extraction, then you can adjust the grind to a coarser setting; and if your coffee tastes flat,a result of under-extraction,you can adjust the grind to a finer setting.
By James Grierson/AZ Golf Alive
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