It should be reserved for those quick pick-me-up cups, not used for an espresso to be savored.Finely ground in burr, not blade, grinders the roast should be dark – French or Viennese. The name refers to the color, not the origin. Blade ‘grinders’ actually chop, not grind. Burr grinders have pyramid shaped teeth on two plates that grind the beans between them.The distance between the plates determines the fineness of the granules. Sand grain-sized is good, powder is too fine, and small-gravel too large.
Of course, the grind should not be exposed to air any longer than necessary. Coffee, like any food, will oxidize and absorb odors from the air. Neither is conducive to a good cup.And, last but not least, a good espresso requires a good quality pump espresso machine that’s scrupulously clean. ‘Good quality’ means: generates heat by boiler or thermoblock and is capable of producing pump pressure of 9 bar or better. A ‘thermoblock’ heats water as it passes through the machine on the way to the pump. Avoid the cheaper units that rely on steam to create pressure.Now you have the basic elements. Next comes the process.
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