Cupping notes that actually teach you something

Cupping is how you find out if a change you made in the drum did anything. Without it you're adjusting the machine and never closing the loop. With it, each batch teaches you something about the next.

A simple routine

You don't need a formal setup to get value from it. Here's what works at a small roastery.

Grind each coffee fresh, same dose, same water, same ratio. Something like 8 to 10 grams per 150 ml is a common starting point.
Pour hot water just off the boil and let it sit for about four minutes.
Break the crust with a spoon, lean in and smell. Then skim the foam off the top.
Wait until the coffee has cooled a little, then slurp from a spoon. Slurp loudly: it spreads the coffee across your mouth.
Go round the cups more than once. They change as they cool, and a cup that's dull when hot can be the best one at the end.

Use two or three cups of each coffee when you can. One cup can mislead you if something went wrong with it.

What to write down

Resist the long flavour-wheel list. Write what you actually noticed, in your own words, and give it a score.

A score you'll use consistently. One to five is plenty. What matters is that you use it the same way each time.
A couple of words about sweetness, acidity and body. "Syrupy, low acidity" tells you more than "complex."
Anything that was wrong. Sour, grassy, flat, ashy, baked. These are the useful ones.

Do this blind when you can. Have someone mix up the cups so you don't know which was the longer roast. It's humbling, and it's much more honest.

Tying it back to the roast

This is where cupping pays off. Go back to the roast log and lay the scores next to the numbers: development time, total time, charge weight, the temperature at the drop.

You might find, as many roasters do, that the best-tasting batches cluster around a particular development time. Or that your scores dip every time a batch ran longer than usual. Those patterns are yours, from your machine and your coffee, which makes them worth more than any number you read.

Don't cup alone forever

Your palate drifts, and you get used to your own roasts. Cup with someone else now and then, ideally someone who'll tell you the truth. An outside opinion is the fastest way to find out that a note you thought was "toasty" tastes burnt to everyone else.

If you sell to cafés or customers, ask for their feedback too. A short comment from someone who drank it on a Tuesday morning at home is a different kind of information, and it's the one that decides whether they come back.