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Espresso Recipe: The iCoffee House Brew

Rich and balanced shot with a thick layer of crema. 18g in, 36g out at 93°C, 1:2 ratio, fine grind, 25-second pull. The modern barista standard.

A single espresso cup on a white saucer with a demitasse spoon, freshly pulled with golden crema from finely ground coffee

The shot at rest, crema settled and the cup ready before the first sip. · Photo by Nathan Dumlao on Unsplash

TL;DR

The modern espresso recipe is a ratio, not a volume. We pull 18g (0.63oz) in to 36g (1.27oz) out in about 25 seconds at 93°C (199°F), a 1:2 ratio, with finely ground coffee tamped evenly. This is the balanced "normale" shot that café standards rest on. Dialing in the grind takes practice. Once that's set, the recipe is consistent shot to shot.

Ratio
1:2
Coffee
18g (0.63oz)
Water
36ml (1.2 fl oz)
Temperature
93°C (199°F)
Grind
Fine
Total time
5 min
Yield
36ml (1.2 fl oz)
Difficulty
Expert

What you need

Required equipment

  • Espresso machine, ideally with a real 9-bar pump (any modern semi-automatic qualifies)
  • Grinder, ideally a burr grinder with fine, espresso-capable adjustment
  • Tamper that fits your basket (the one your machine ships with works to start)
  • Kitchen scale with 0.1g precision, or one with a built-in brew timer

Nice to have

  • Bottomless ("naked") portafilter to see channeling instantly
  • Distribution tool (WDT or similar) to evenly spread the grounds before tamping (step 3)
  • PID or boiler thermometer to keep group temperature stable

Ingredients

  • 18g (0.63oz) freshly ground coffee (fine grind, 7-21 days post-roast)
  • 36ml (1.2 fl oz) brewed espresso (yield, not input water) (2x the dose, pulled at 93°C)

The recipe

1
at 0:00, ~1:00

Preheat the machine and lock the empty portafilter into the grouphead.

Lock portafilter in while the grouphead warms to stabilise temperature.
Stainless steel espresso group head with visible steam, warming up before the shot is pulled
Hot water passes through the grouphead, warming the metal before the shot.
2
at 1:00, ~30s

Grind 18g (0.63oz) of coffee directly into the basket.

Grind finer if the shot runs too fast; coarser if extraction is very slow.
Top-down view of an 18-gram dose of finely ground coffee falling into a stainless portafilter basket
The 18-gram dose lands fresh in the basket, ready to distribute.
3
at 1:30, ~30s

Distribute the grounds with a WDT or tap, then tamp firmly and level (around 15 kg force).

Level, consistent tamping reduces channeling.
A hand pressing a level stainless tamper into the dosed portafilter on a dark stone counter
Pressing the tamper level keeps the bed of grounds even.
4
at 2:00, ~25s

Lock in, start the shot, and stop when the scale reads 36g (1.27oz) in 25-30 seconds.

Stop at target yield (36 g for 18 g dose). Use scale.
Espresso pouring from the portafilter into a small white ceramic cup, golden crema forming on top
The shot pours steady, with crema building at the surface of the cup.

Why this recipe works

Espresso amplifies every variable. Nine bars of pressure means small grind, temperature, or tamp errors land hard inside 25 seconds of contact. The numbers below are the modern third-wave defaults because that's where the variables balance.

Ratio. 1:2, 18g (0.63oz) in to 36g (1.27oz) out. Ristretto pulls (1:1) over-emphasise body and acidity; lungo pulls (1:3) thin out and turn bitter past the brew window. 1:2 is the modern "normale", the SCA dial-in that gives the most balanced extraction across light, medium, and dark roasts.

Temperature. 93°C (199°F). Hotter pushes bitterness; cooler pushes sourness. The 92-94°C band is what every PID-controlled machine targets.

Grind. Fine. Espresso runs on resistance, and the grind is the lever that controls flow. Coarser and the shot gushers; finer and it chokes. The dial-in is daily because humidity, bean age, and grinder burr wear all shift the sweet spot.

Tamp. Level matters more than hard. An unlevel tamp causes channeling, where water finds the path of least resistance and bypasses most of the coffee. Channeling is the single biggest reason home shots taste sour.

What makes this ours

Espresso ratios change with bean development. Lighter roasts often pull better at 1:2.5, darker roasts at 1:1.8. The 1:2 default is where to start; the recipe stays the same, but adjust the yield up or down by a gram each session based on how the cup tastes.

What to adjust

If your shot tastes bitter and burnt: your grind is too fine and the shot ran past 35 seconds, or your water is too hot. Step one click coarser and check the brew temperature.

If your shot tastes sour and watery: your grind is too coarse and the shot ran under 20 seconds. Step one click finer.

If your shot gushes or channels, your tamp likely wasn't level, or the grounds didn't quite reach a corner of the basket. Use a WDT tool to distribute everything evenly before you tamp, and use your fingers around the rim of the portafilter to feel if your tamp is level.

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