How to cup coffee (the SCA way)

Cupping is the coffee industry’s standard way to taste. It strips out the variables of brewing so that what you taste is the coffee, not your technique. Everyone uses the same ratio, the same grind, the same water, the same steep, then tastes side by side from identical bowls. That is the whole point: it is a leveling, repeatable immersion brew designed for comparison and scoring, not for the perfect cup. The protocol below follows the Specialty Coffee Association cupping standard, the one used on the Q grading exam.

The standard setup: ratio, grind, water

The SCA ratio is 8.25 grams of coffee per 150 mL of water, which works out to roughly 1:18.18. In practice most people round to a clean 8.25 g in 150 mL or scale it (for example 11 g in 200 mL) as long as the ratio holds. Use identical bowls, ideally 200 to 270 mL tempered glass or porcelain, one bowl per sample, and traditionally five bowls per sample on a competition table so you can catch an off bowl.

Grind matters more than people expect. The standard calls for a fairly coarse grind, coarser than a typical drip grind: think 70 to 75 percent passing a 20 mesh sieve, which in everyday terms sits between a drip and a French press grind. Grind each sample fresh, within about 15 minutes of pouring, and purge the grinder with a few grams of the same coffee before grinding the sample so you are not contaminating it with fines and oils from the last batch.

Roast the samples to a light-to-medium roast, rested 8 to 24 hours, never an espresso roast. Water should be clean and within the SCA brewing range, around 125 to 175 ppm total dissolved solids, brought to roughly 93 C (200 F) off the boil. Smell the dry grounds (the “fragrance”) before you add water, because aromatics escape fast.

The ritual: crust, skim, slurp

Pour water directly onto the grounds in each bowl, saturating everything, and start a timer. The grounds rise and form a floating cap called the crust.

• Steep. Let the bowls sit undisturbed for 4 minutes. Do not stir, do not poke.
• Break the crust. At the 4-minute mark, lean in close, push the crust back gently three times with the back of a spoon, and inhale. This release of trapped gas and steam carries the most aromatics you will get, the “break” aroma. Use a clean spoon or rinse it between samples in hot water so you do not carry flavor from bowl to bowl.
• Skim. After breaking, skim the foam and floating grounds off the surface with two spoons, clearing the bowl so you can taste cleanly.
• Slurp. Begin tasting once the liquid has cooled to about 71 C (160 F), usually a few minutes after the break. Slurp aggressively off a spoon so the coffee aerosolizes across your whole palate and retronasal passage. It feels rude and it is supposed to: the spray is how you perceive the full aroma and mouthfeel.

Then taste as it cools. This is the part beginners skip. You evaluate the same coffee at hot, warm, and near room temperature (down to roughly 21 to 27 C). Acidity and sweetness read differently as temperature drops, and defects like astringency or a hollow body often only show up in the cooler cup. A coffee that is still pleasant cold is usually a genuinely good coffee.

The scoring categories

The SCA cupping form scores ten attributes, most on a 6 to 10 quality scale in quarter-point steps. You start at a notional 36 baseline and the attributes build to a possible 100. A score of 80+ is the threshold for “specialty”; world-class lots sit in the high 80s and 90s. The categories:

• Fragrance/Aroma (dry grounds plus the wet break).
• Flavor (the main combined taste-and-aroma impression).
• Aftertaste (length and quality of what lingers; a short or harsh finish loses points).
• Acidity (its quality and intensity; bright and structured scores well, sour and flat does not).
• Body (weight and texture on the palate).
• Balance (how the elements fit together).
• Uniformity (are all five cups the same? scored per cup).
• Clean cup (free of off-flavors and taints; scored per cup).
• Sweetness (presence of sweetness; scored per cup).
• Overall (the cupper’s holistic judgment, where you can reward or penalize character).

Uniformity, clean cup, and sweetness are scored as 2 points per qualifying cup across five cups, which is why a single tainted or quaker-spoiled bowl visibly drags a score. Any defects (a taint or a fault, like a sour, phenolic, or fermented bowl) are subtracted at the end. The vocabulary you reach for during all of this comes straight off the SCA flavor wheel. For the full grading workflow and the Q system, see scoring-and-q-grading.

How to run a cupping at home

You do not need a lab. You need a scale, a kettle, a timer, and matching vessels.

1. Pick 2 to 4 coffees to compare, and use identical bowls or wide mugs, two or three per coffee if you can.
2. Weigh 8.25 g per 150 mL into each bowl (or scale up cleanly). A kitchen scale to 0.1 g and a coarse, consistent burr grind do the heavy lifting.
3. Smell the dry grounds. Pour 93 C water to fully saturate, start your 4-minute timer.
4. At 4 minutes, break the crust (three pushes, inhale), then skim each bowl.
5. Wait until it cools to drinkable, then slurp from a spoon, rinsing the spoon in hot water between samples.
6. Taste blind if you can. Have someone label bowls with codes so price and origin do not bias you, and taste each coffee right next to the others. Comparison is where your palate learns fastest.

Keep notes on the same few attributes each time (acidity, body, sweetness, finish) and you will start to read your own tasting notes meaningfully, which is the real prize. The protocol is rigid on purpose, but the goal at home is calibration, not a perfect 100-point form.

Next: take the words you found here onto the sca-flavor-wheel to get specific, then read scoring-and-q-grading to see how cupping scales up into formal Q grading.