A good espresso with a thick, even froth depends
not only on the quality, pressure and temperature of
the water and the quality of the coffee beans, but
also on the quantity of beans and how finely they are
ground.
The froth should have an even colour with dark
stripes running through it.
Grinding the coffee
To avoid damage to the machine, the slide
control for the coffee grinder setting should be
moved carefully and in small stages.
There are various ways to tell whether the coffee
grinder is set correctly:
– If espresso flows too quickly into the cup, it
means that the coffee has been ground too
coarsely and the pressure is not sufficient. The
grinder should be set on a finer setting.
– If espresso only trickles into the cup, the coffee
beans have been ground too finely and the coffee
will be bitter. The grinder should be set on a
coarser setting.
–
If the froth is evenly coloured but pale, this is also
a sign that the coffee beans have been ground
too coarsely.
–
If the froth is very dark brown on one side,
graduating almost to white on the other, it
suggests that coffee beans have been ground too
finely.
Programming the coffee grinder
43
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