Pressure / Preparation / Adjustments
Espresso
Espresso uses hot water under pressure to extract a lot of flavor in a small volume. It is fast, technical and sensitive: small changes in grind, dose or distribution are very noticeable.
16-20 g depending on basket
1:1.8 to 1:2.5
25-35 seconds
Fine and even
Extraction principle
How this method works
In espresso, water passes through a compact coffee bed. The grind creates resistance; the pump adds pressure; the puck must offer an even flow. If water finds easy paths, channeling appears and the cup loses balance.
The recipe is built as a relationship between dry dose, final beverage and time. A common baseline is 18 g of coffee for 36 g of beverage in 25 to 35 seconds, but each coffee may need adjustment.
Applicable gear
Buying guides for this method
If you need to choose gear, these catalog tools fit the recipe. Each link takes you directly to its buying recommendations.
Process
Step-by-step preparation
Preheat
Heat the group, portafilter and cup. Cold equipment steals temperature and reduces sweetness.
Weigh and grind
Weigh the dose, grind just before brewing and avoid large clumps.
Distribute
Spread the coffee evenly before tamping. The surface should be level.
Tamp straight
Press firmly and horizontally. You do not need extreme force; you need consistency.
Extract and weigh
Start extraction and stop by weight, not only by visual volume.
Evaluate
If it tastes sour, grind finer or increase yield. If it is dry and bitter, grind coarser or shorten the shot.
Tips
How to improve preparation
Change one variable
Adjust grind before changing dose, temperature and ratio at the same time.
Respect the basket
Use a dose compatible with the basket. Overfilling or leaving too much headspace creates problems.
Clean oils
Backflushing and shower-screen cleaning prevent rancid flavors.
Do not chase crema alone
Crema does not guarantee quality; beverage balance matters.
Diagnosis
Common mistakes
Runs too fast
Grind finer, check dose or improve distribution.
Irregular streams
Likely channeling: distribute better and check tamping.
Sour taste
Under-extraction: finer grind, more time or higher temperature.
Dry taste
Over-extraction: coarser grind, lower yield or lower temperature.
Compare methods
Back to the general guide
Use this recipe as a starting point. Then compare other methods to decide whether you want more body, more clarity, more intensity or easier daily brewing.