☕ Espresso Brew Guide
The foundation of café culture, brewed under pressure
Espresso is brewed by forcing hot water through finely ground, tightly packed coffee under 9 bars of pressure, producing a 25–35 ml concentrated shot with a characteristic layer of golden crema. The foundation of lattes, cappuccinos, and flat whites — and a rewarding craft to master at home.
Coffee
18g
freshly ground
Water
36ml
filtered
Temp
93°C
199°F
Grind
Extra fine
Like fine powdered sugar — finer than any other method. A small grind change makes a big difference.
Total Time
1:28
5 steps
Ready to brew
Preheat
Flush the group head with hot water for 3–5 seconds. This stabilizes temperature and removes residual coffee oils. Lock in the portafilter for 10 seconds to preheat it too, then remove.
0:20
☕ Brew complete! Enjoy your Espresso.
Recipe Steps
1
Preheat 0:20
Flush the group head with hot water for 3–5 seconds. This stabilizes temperature and removes residual coffee oils. Lock in the portafilter for 10 seconds to preheat it too, then remove.
2
Dose & Distribute 0:20
Weigh 18 g of freshly ground coffee into the portafilter basket. Use a finger or distribution tool to level the grounds — even distribution prevents channeling (water bypassing grounds through low-resistance paths).
3
Tamp 0:10
Place the portafilter on a flat surface. Apply firm, level pressure with your tamp — about 15–20 kg. Twist slightly to polish the puck. Wipe any grounds from the basket rim.
4
Lock In & Start Timer 0:10
Lock the portafilter into the group head. Start your shot timer and initiate the pull simultaneously. Target: first drops appearing within 7–10 seconds.
5
Pull Shot 0:28
Target 36 ml (±4 ml) in 25–35 seconds from start. A good shot flows like warm honey — not splashing, not dripping. Stop at 36 ml or 35 seconds, whichever comes first. If under 25 sec: grind finer. Over 35 sec: grind coarser.
Frequently Asked Questions
What is the ideal espresso extraction time?
25–35 seconds from the moment you start the pump. Within that window, the shot extracts balanced sweetness, acidity, and body. Under 25 seconds is under-extracted (sour, thin). Over 35 seconds is over-extracted (bitter, astringent).
What is espresso crema and why does it matter?
Crema is the reddish-brown foam on top of espresso, formed by CO₂ dissolved in water under pressure. Fresh crema is a sign of fresh coffee and proper extraction. It carries aromatic compounds that contribute to espresso's intense flavor — but disappears quickly.
Why is espresso grind so much finer than other methods?
Espresso extracts in under 30 seconds with just 36 ml of water. To extract enough flavor in that short time with such little water, the grind must be fine enough to create resistance and slow the flow of water. Too coarse = under-extraction in seconds.
What does "channeling" mean in espresso?
Channeling happens when water finds a low-resistance path through the coffee puck, extracting that channel heavily while leaving surrounding grounds under-extracted. It produces a shot that's simultaneously sour and bitter. Good distribution and tamping prevents it.
How much caffeine is in an espresso shot?
A 36 ml double espresso contains approximately 60–70 mg of caffeine — less per volume than drip coffee but more concentrated. Because espresso is consumed in much smaller amounts, the total caffeine per cup is actually similar to a standard 8 oz drip.