Cupping costs you an hour, six matching bowls and the willingness to make coffee you would not choose to drink. The brew it produces is deliberately dull. Full immersion, no filter, a fixed ratio nobody would pick for pleasure, and grounds skimmed off the top with a spoon. That is the price, and it is worth paying because the method is not trying to make a good cup. It is trying to remove every variable except the one you came to look at.
The kit is six matching bowls, one spoon per person plus one for skimming, a scale that reads to 0.1 g, a kettle, and a timer. No cupping bowls, no cupping spoons, no scoring form. The numbers that do the work are 8.25 grams of coffee to 150 grams of water, ground slightly coarser than you would for drip, steeped four minutes, crust broken and skimmed, then tasted from a spoon as it cools.
That ratio comes from the Specialty Coffee Association's cupping protocol. It works out at roughly one part coffee to eighteen parts water, and it is the one number in this article you should not adjust on the first attempt.
Why six bowls and not three
Jessica Easto, in How to Taste Coffee, recommends cupping two or three coffees at a time and notes that the professional practice of setting out five bowls of each sample is there to check uniformity across a lot of green coffee. A home taster does not need five.
A home taster does need two, and for a different reason. Run three coffees in duplicate and the second bowl of each pair is a control on your own preparation. If you can taste a difference between two bowls that contain the same coffee, prepared by you, four minutes apart, then your grinder, your pour or your fill line is introducing more variation than the coffees are. That is worth knowing before you write a word about origin character.
Six bowls, three coffees, two of each. You will also want two ordinary cups behind the row, one for spent grounds and one of clean water for rinsing spoons.
The kit
| Item | Specification | Why it is on the list |
|---|---|---|
| Six bowls | 200 to 270 ml, shallow, wide-mouthed, identical in size, shape and colour | Wide mouths let the aromatics off the surface, and matching bowls remove the visual cue that would otherwise tell you which sample is which |
| Spoons | One soup spoon per taster, plus one for skimming | Everyone tastes from their own spoon, which is what lets four people work down the same row of bowls without sharing a rim |
| Scale | Readable to 0.1 g | Water weighs the same as its volume, so one instrument measures both |
| Kettle and thermometer | Water at 93 to 96 °C | Below that the extraction stalls in four minutes, above it you are scalding the grounds at the surface |
| Timer | Anything | Four minutes matters more than most people expect |
| Water | Filtered. If you can smell chlorine in it, do not use it. Nothing distilled, nothing off a softener | Distilled water extracts poorly and softened water carries sodium that flattens acidity |
| Burr grinder | Slightly coarser than drip | A blade grinder produces particles across too wide a size range for the samples to be comparable |
One instrument does two jobs here, which is the reason weighing water instead of measuring it is the cheapest accuracy upgrade in coffee. And the grinder is not optional in the way the rest of the list is, because a blade grinder makes dust and boulders in the same batch and dust over-extracts while boulders sit there.
The method
- Find the capacity of one bowl. Sit it on the scale, tare, and run water in until it is level with the rim. Read the number. The bowls match, so you only ever do this to one of them.
- Work out the dose from that number. Multiply the bowl's water weight by 0.055. A bowl that holds 240 g of water wants 13.2 g of coffee, which you round to 13. Write that down next to the capacity.
- Set the table before you grind. Six bowls in a row, left to right. The spent-grounds cup and the rinse cup go behind that row, where your elbow will not find them. Put the timer somewhere you can start it without looking down. Once the water goes in, you have four minutes and no slack.
- Grind and smell. Weigh the beans, grind, weigh again and correct. Between coffees, sacrifice a small handful of whichever one is coming next: grind it, bin it, and the grounds retained from the previous coffee leave with it. Smell each bowl of dry grounds before the water arrives. That smell is fragrance, and it is a different thing from what you will smell once the coffee is wet.
- Pour, fast, and start the timer. Fill each bowl to the brim, working left to right without pausing. The bed lifts instead of sinking, so what you are levelling against the rim is a raft of wet grounds and not the liquid underneath it. Grind no more than fifteen minutes before this moment, which is the SCA protocol's own limit, because the volatile compounds you are here to assess start leaving the instant the beans are broken open.
- At four minutes, break the crust. Push through it with your spoon a few times and put your nose over the bowl while you do. This is the most concentrated aroma you will get all session. Then take a spoon in each hand, start where the crust meets the rim, and sweep both around and outward so the grounds and the foam gather between them. Tip that into the spent-grounds cup, carrying as little liquid as you can. Both spoons then go through the rinse cup before they touch bowl two, or you have just moved a little of bowl one into it.
- Wait for the temperature. The SCA protocol puts the first taste at about 71 °C. In practice that is eight to ten minutes of standing there after the pour. Hot liquid suppresses your ability to detect flavour, so tasting immediately wastes the sample.
- Taste left to right, then again as it cools. Take a spoonful from the surface and slurp it. Rinse the spoon, step right, repeat. Then go back and taste the whole row again ten minutes later, and again at room temperature. The SCA stops evaluating around 21 °C.
Why the strange parts are not optional
The slurp. Pulling the coffee in fast, with air behind it, atomises it. Two things follow. The liquid reaches the whole tongue instead of pooling at the front, and the aerosol carries volatile compounds up behind the soft palate into the nasal cavity, which is the route called retronasal olfaction and the route most of what you call flavour arrives by. Noise is a by-product of the technique, not the technique. A quiet slurp does the same work, so the volume is entirely your own business.
Tasting the row repeatedly as it cools. Different compounds are perceptible at different temperatures, so a coffee at 70 °C and the same coffee at 25 °C are legitimately different experiences. Most people have never tasted a coffee cold on purpose and are surprised by which one improves.
The rinse cup and the left-to-right discipline. Beyond hygiene, the order itself does work on you. Jessica Easto sets this out in How to Taste Coffee, drawing on the SCA's Coffee Sensory and Cupping Handbook: a bad bowl lifts the apparent quality of whichever bowl follows it, and the sensory literature calls that carry-over. The professional answer is to shuffle the running order between sessions. Rinsing the spoon between bowls is the least you can do.
How you know it worked
Taste your two duplicate bowls against each other before you compare coffees. If you cannot separate them, your preparation is consistent and any difference you find afterwards belongs to the coffee. If you can separate them, stop and fix the cause before drawing conclusions. Grinder retention between doses is the usual culprit, followed by uneven fill levels.
That check is the whole reason to bother with six bowls, and it is what turns an afternoon of impressions into something you can build on. It is also the mechanism behind the broader case that a coffee tasted on its own tells you almost nothing.
What cupping will not do
It will not tell you how the coffee will taste from your brewer. Cupping is unfiltered immersion at a fixed ratio, and a paper-filtered pour-over of the same beans will have different body, different clarity and a different balance. Roasters' tasting notes are generated at the cupping table, which is a large part of why those notes so often fail to appear in your V60.
It will not give you a quality score, and it is not meant to. By the SCA's own definition the word barely applies to what you are doing. The term belongs to the people who buy green coffee by the container and it names the procedure they price a lot with, months before anyone roasts it. A table run at home for the pleasure of learning something sits outside that definition however we all talk about it. The coffee in front of you has already been graded. You are exploring it.
It will not hand you vocabulary either. You will notice a difference long before you can name it, and the gap between those two abilities is measured in months.
And it will not protect you from your own expectations. If you know which bowl holds the natural process, you will find fruit in it. That is not weak character. The SCA's Coffee Sensory and Cupping Handbook records the same bias in trained tasters, which is why blind preparation exists at all. Write each coffee on a strip of masking tape stuck under its bowl, shut your eyes, push the row about until you have lost the order, and let the coffee argue for itself.