Questions tagged [espresso]

For questions about the beverage consisting primarily of coffee brewed by forcing a small amount of nearly boiling water under pressure through finely ground coffee beans.

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How much volume of the shot should pre-infusion take up?

The espresso machine I use at work has a pre-infusion step. I've been wondering if the volume of the pre-infusion affects the shot, especially the pressure of the main extraction.
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Why does my steam-pressure based Espresso machine not push water through the group head?

I have A DeLonghi BCO100IU espresso machine, but when I turn it on for espresso, even with a full boiler, no water comes out of the group head. I am certain this machine works on steam pressure, ...
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Does an inconsistent roast affect espresso extraction? If so, how?

I'm not really asking about flavour, I understand that an inconsistent roast causes inconsistent flavour. My question is how it affects the extraction itself. Does an uneven roast lead to an uneven ...
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Can I lenghten the funnel of a stainless steel moka pot?

In the classic aluminum version of the cooker, the downward spout reaches the bottom almost entirely, whereas the stainless steel cooker (for induction) the funnel spout is much shorter, leaving a gap ...
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52 views

Source for Coffee beans characteristics per origin?

Can I find an information/source for the characteristics for each coffee beans per origins ? for example the acidity level, flavors, aroma , etc for Brazilia-Santos, Harrar, Djimmah , etc.. ? And ...
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steam flow interruptions, air in the system?

I am posting 3 different videos that show the steam flow of my Nuova Simonelli Oscar I, these videos were all taken this morning with a few minutes interval between them (just the time needed for the ...
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What's the diagnostic of this bottomless extraction

I have juste bought a nuova simonelli musica / eureka mignon, and I m making test with a bottomless filter. Here are the pics: The extraction: https://imgur.com/a/v7uoFG6 The coffee after extraction: ...