How to make espresso
How to make espresso (by "Raf")
1. What is espresso?
Espresso is commonly defined as 7g + 90°C + 9bar + 25s + 30ml. (with a 5% tolerance). This means:
- 7 grams of coffee
- with water of 90 degrees Celsius
- forced through the grounds at a pressure of 9 bar
- in 25 seconds
to get a 30 ml. cup.
Note: a lot of coffee afficionados use a double filter basket and pull what is really a double ristretto: some 30 -40 ml. of espresso, made with 14 grams (or even more) of coffee, with the other variables unchanged (9 bar, 90 Celsius, 25 seconds).
2. What do I need to make a decent espresso?
- An espresso machine that can deliver 9 bar of pressure on the grounds.
- Ideally, a burr grinder (for these requirements, see "FAQ on machines").
- Fresh coffee: roasted within a week or two of preparing the drink, freshly ground.
3. How do I go about it?<ol style="list-style: lower-roman; list-style-type: decimal;">
Test your espresso by pouring a small spoon of sugar on the crema: it should stay on top of the crema for a while.
How to pull espresso shots is a matter about which there is a variety of opinions concerning variations in technique. This is one man's attempt to provide some simple instructions for the beginner. As you become more experenced no doubt you will become more opinionated. Enjoy the journey!
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