# How to Taste Coffee (/en/docs/foundation/phase-6/chapter-35)
## Phenomenon [#phenomenon]
You buy a highly rated bag of beans. The label says: jasmine, citrus, honey.
You brew a careful cup and take a sip. What you taste is: coffee, a bit sour. No jasmine, no honey. A friend tries the same cup, says "it's a bit like black tea", then frowns: "I still prefer dark roasts."
Is your palate broken, or is the label wrong? And if your friend dislikes it, does that mean these beans are not that good after all?
## Variables [#variables]
"Tasting" is more complicated than it looks. A single sip uses at least all of these at once:
| Dimension | What you are paying attention to |
| ---------- | ------------------------------------------------------------------------------------------------------- |
| Aroma | What you smell: with the cup under your nose, and what rises from the back of your mouth as you swallow |
| Acidity | A bright, juicy feeling — or a sharp, harsh one |
| Sweetness | A round, soft feeling that often makes acidity and bitterness pleasant |
| Bitterness | The bitterness on your tongue, and whether it is clean or muddy |
| Body | The weight and texture in your mouth: like water, like milk, or like syrup |
| Aftertaste | After you swallow, how long the taste lingers, and whether what lingers is pleasant or drying |
Some things that are not in the cup also change what you taste: the coffee's temperature, what you just ate, what you drink it from, what you read beforehand, and whether you taste one cup alone or two side by side.
## Experiment [#experiment]
The first experiment you can do right now. Pinch your nose, take a small sip of coffee, hold it in your mouth, then let go of your nose.
While your nose is pinched, what can you still taste? What happens the moment you let go?
The second experiment. Brew two cups of the same coffee and add a little extra hot water to one. First taste just one of them and try to write down its flavors. Then put the two side by side and answer four questions: which is sweeter? Which is more acidic? Which has more body? Which has the longer aftertaste?
Which is easier — writing down flavors, or answering those four questions? Will your answers be more consistent?
## Observation [#observation]
With the nose pinched, most people are left with only a few things: some sourness, some bitterness, maybe a little sweetness, and the texture in the mouth. The "coffee flavor" almost disappears. The moment you let go, it rushes back.
That is because when you swallow and breathe out, aroma travels from the back of the mouth into the nasal cavity and is picked up by smell, and we experience it as something "tasted in the mouth". Much of what people call "taste" in everyday life actually comes from smell.
In the second experiment, describing a single cup is usually hard and the words come out vague; with two cups side by side, "which is sweeter, more acidic, heavier" is usually much easier to answer, and the answers are more consistent. Sensory research relies heavily on comparisons like this, rather than asking people to describe things out of thin air.
## Model [#model]
### "Taste" is several channels combined [#taste-is-several-channels-combined]
In a sip of coffee, at least three channels are working at once:
* **Taste on the tongue**: the basic tastes — sweet, sour, bitter, salty and savory (umami) — are detected by taste receptors on the tongue and in the mouth.
* **Smell in the nose**: floral, fruity, nutty, caramel, smoky… almost every "it's like…" flavor travels this way.
* **Touch in the mouth**: body is the weight of the texture; the drying, puckering feeling is usually classed in sensory research as touch rather than a taste.
Then add **time**: from the first sip, to swallowing, to the aftertaste, each stage highlights something different.
### Six dimensions, linked back to brewing [#six-dimensions-linked-back-to-brewing]
Each of the six dimensions above links back to variables you have already met. The links below are clues for troubleshooting, not conclusions:
| Dimension | Often related to |
| ---------- | ---------------------------------------------------------------------------------------------------------------------- |
| Aroma | The bean, processing, roast, freshness |
| Acidity | The bean itself; sharp, thin acidity is often linked to under-extraction; water alkalinity changes it too (Chapter 21) |
| Sweetness | Whether extraction is right, and even |
| Bitterness | Roast level, over-extraction, too high a strength |
| Body | Strength; the filtration method (Chapter 28) |
| Aftertaste | When over-extracted, the aftertaste is often drying |
Sweetness deserves one more note: how much of the sweetness we taste in black coffee comes from sugar, and how much from associations triggered by aroma, is not yet settled.
### Perception first, vocabulary second [#perception-first-vocabulary-second]
Now back to the "jasmine, citrus, honey" on the label.
Those words are **analogies**: they do not mean jasmine was added, only that certain aromas reminded tasters of jasmine. So that people use words consistently, the industry shares a set of tools: World Coffee Research's Sensory Lexicon gives more than a hundred flavor, aroma and texture terms each a reference and an intensity, and the Coffee Taster's Flavor Wheel groups and layers those terms by how similar they are.
These tools are useful, but they are **the second step**. The first step is perception: answer comparison questions like "sweeter or more acidic, heavier or thinner" first, then go looking for words. Start with broad words (fruity, floral, nutty, chocolate) and narrow down once you are sure. Not finding "jasmine" is perfectly normal — it is a very specific word that takes practice and references.
### What you taste is changed by conditions [#what-you-taste-is-changed-by-conditions]
Change the conditions and the same cup can taste different:
* **Temperature**: the flavor changes as coffee cools. Cuppers taste again and again at different temperatures for exactly this reason.
* **Expectation and context**: one study found that people drinking the same latte from a white mug rated it more intense and less sweet. The flavor notes you read beforehand also shape what you look for.
* **The person**: people's sensitivity to bitterness varies genetically. The bitterness of the same cup may not be the same amount for you and your friend.
So when you seriously compare two cups, keep everything else as equal as possible: the same cups, the same temperature, and ideally without knowing which is which.
### Preference and quality are two questions [#preference-and-quality-are-two-questions]
Finally, the central question of this chapter.
**Preference** asks: do you like it? There is no right or wrong here. Research keeps finding that consumer tastes are spread over a wide range and split into clearly different groups: some like intense and bright, others soft and low in acidity.
**Quality** asks: how good is this coffee in itself? That is harder to pin down than preference, but it is not purely subjective:
* Some problems most trained tasters would call defects: moldy, earthy, stale, or off flavors from fermentation gone wrong.
* A specialty coffee score is a judgement by trained people under standardized conditions. It reflects a shared set of standards within the industry, not an objective number independent of people.
* The industry itself is separating the two: the Specialty Coffee Association's new assessment method splits "describing what the coffee has" and "the taster's overall impression of its quality" into two separate forms.
Put together: **disliking a coffee does not mean it is low quality; a high score does not guarantee you will like it.** Both questions are worth asking — just do not use the answer to one to answer the other.
## Transfer [#transfer]
Next time you taste your own coffee, try this order:
1. **Smell**: first the dry grounds, then the brewed coffee.
2. **Taste twice**: once while hot, again after it cools a little.
3. **Compare**: if you can, put it beside the previous cup or another one and answer "sweeter, more acidic, heavier, longer aftertaste".
4. **Name**: only then look for words — broad first, then narrower.
5. **Ask separately**: do I like it? Does it have defects?
Comparative language works better with other people too. Telling a barista "a bit more body, a bit less acidity" is far easier to act on than "make it taste better". And when you want to fix a cup, these sensations are exactly the way into the troubleshooting table in Chapter 24.
## Misconceptions [#misconceptions]
**"I dislike it, so it is low quality."** Preference and quality are two questions. You can dislike a bright light roast while recognizing that it is clean and free of defects; and you can enjoy a cup that is far from perfect.
**"If I can't taste the notes on the bag, my palate is bad."** Flavor notes are analogies, and often very specific ones. Start with comparisons: which cup is sweeter, which more acidic. Vocabulary comes with practice, and it needs references.
**"Tasting coffee is a gift; ordinary people can't learn it."** People do differ in how sensitive they are to some tastes, but the skills of comparing, recording and finding words can mostly be improved with practice.
## Real Lab [#real-lab]
Here is one way to do it:
1. Ask someone to prepare three cups of coffee for you: two exactly the same, and one that differs in one way — for example, a little extra hot water, or a different coffee. The three cups must look identical, and should be at about the same temperature.
2. Have them mark the bottoms and shuffle the order while you are not looking.
3. Taste the three in turn, and you **must** pick the one you think is different, even if it is a guess.
4. Do several rounds, reshuffling each time.
By pure guessing, you pick the right cup one time in three. This "find the odd one out of three" method is a standardized sensory test used to decide whether two samples differ in a way people can actually taste. If over several rounds you do clearly better than one in three, the difference is one you can taste.
Once you get it right, take the second step: how exactly is the odd cup different? Answer the comparison questions first — sweeter or more acidic, heavier or thinner, longer or shorter aftertaste — and only then look for words.
## Check Your Model [#check-your-model]
**Predict.** The "different" cup of the three only has a little more water than the other two. Before you start, write down: do you think you can find it? If so, which dimension are you most likely to notice it in?
Adding water changes strength, not extraction, so the character barely changes — the intensity does. The easiest clues are usually body and overall intensity: that cup is thinner and weaker, and both acidity and bitterness are a little quieter. The smaller the difference, the harder it is to find, which shows why comparison is more sensitive than describing a single cup.
**Diagnose.** A friend says: "This coffee scored over ninety, but to me it is sour and thin. Scores are a scam." What might they be missing? What would you suggest they do first?
Two things need separating. First, a score reflects trained tasters' judgement of quality under standard conditions; it is not their preference, and they are free to dislike bright acidity. Second, "sour and thin" may also be under-extraction in their own brewing, not necessarily how the coffee really is. They could grind a little finer and brew again to see whether the acidity becomes wrapped in sweetness; if they still dislike it, that is a matter of preference.
**Explain.** In your own words, explain to a friend why the "coffee flavor" almost vanishes when you pinch your nose — and what that has to do with "perception first, vocabulary second".
The tongue can only detect a few basic tastes — sweet, sour, bitter, salty and savory — while most "it's like…" flavors come from aroma, which travels from the back of the mouth into the nose as you swallow. Pinch your nose and that route is cut off, leaving only the basic tastes and texture. That shows "flavor" is several senses combined, so you first separate and compare what you can perceive, and only then find words for it.