Espresso Bible isbn:9789863770886

Extraction Conditions

Coffee bean 7-8g

9bar

93 C hot water

20-30s extract time

30ml

Compare to other’s brewing methods, as relative short extract time for espresso, the caffeine is relative lower.

Leveling is not conducted probably, density of coffee powder will not be balanced within filter basket, which could cause “channeling” effect.

Flush the group head before the portafilter is mounted have 2 reasons:

1. Clean the machine

2. Stabilize the temp of machine

After the portafilter is mounted, extract should be started a.s.a.p as the group head is heated and it could cause chemical reaction of coffee powder.

Milk steaming – Organic substances in milk cause tension force, so the milk foam may remain a period of time once its form.

Temperature for milk steaming

Starting at 10-15 C and Stopping before 65 C