How does coffee tasting work, from coffee aroma to off-flavors?

Coffee tasting is not about naming flavors; it is about judging whether a cup tastes good and why. The practical approach covers six dimensions: aroma, acidity, sweetness, mouthfeel, aftertaste, and off-flavors. Smelling the coffee before sipping, even without exact descriptors, still reveals floral, fruity, caramel, or nutty notes. The same method applies whether the cup is a single-origin coffee or an instant one.

Instant coffee and single-origin coffee are consumed for different reasons, so they are treated differently. Instant is bought for convenience and caffeine, while single-origin coffee is meant to deliver a fuller flavor experience, which is why drinkers slow down for it. Indonesian coffee tasting notes, for example, tend to be earthy and low in acidity, so a taster comparing regions can note how sweetness, body, and finish shift from cup to cup.

Many people think that coffee tasting is about being able to name a few flavors, but that's not really the case. The essence of tasting lies in tasting and discerning, and it is fundamentally different from casually drinking a cup in daily life. We rarely "taste" instant coffee, not simply because of the difference in taste quality, but because the two types of coffee are consumed with different purposes: instant coffee is mainly about convenience and alertness, while single-origin coffee is meant to present a richer taste experience. Even so, tasting does not require you to be able to reel off a string of flavor descriptors. Front Street Coffee believes that the most important thing is to be able to tell whether this cup of coffee tastes good or not, where it tastes good, or if it doesn't taste good, what kind of unpleasantness it is. This article will walk you through a practical approach to coffee tasting step by step, from six dimensions: aroma, acidity, sweetness, mouthfeel, aftertaste, and off-flavors.

The truth is not always so. Tasting means first tasting, then discerning, which is what sets it apart from ordinary coffee drinking. Just as we are often willing to take the time to taste a single-origin coffee, we rarely treat instant coffee with the same attitude.

Behind this is not just the fact that single-origin coffee has superior flavors; more importantly, people drink these two types of coffee for fundamentally different reasons. Instant coffee was positioned from the start as a convenient and quick source of caffeine, so those who drink it naturally don't hold high expectations for its taste; while the very purpose of single-origin coffee is to deliver a better flavor, so people treat it more seriously.

However, tasting coffee does not mean you must be able to detect specific flavors. Front Street Coffee has always believed that the most basic task is to judge whether a cup of coffee tastes good and in what way it tastes good; conversely, if you encounter an unpleasant taste, what kind of unpleasantness it is. Front Street Coffee suggests approaching tasting from the following angles.

- Aroma

Before picking up the cup, first smell the aroma the coffee gives off. Even if you can't accurately name the specific flavor, you can still catch hints of floral, fruity sweetness, or coffee aromas like caramel and nuts. This is undoubtedly one of the most precious parts of coffee.

- Acidity

The acidity discussed here is not about how high the acidity is, but about the quality of its expression. For example, when drinking coffee, if the sourness reminds you of fresh fruit, that means the acidity of this cup is excellent. It is usually described as lively acidity, soft acidity, or acidity with clear layers.

Less ideal acidity includes spoiled acidity (a rotten flavor from over-fermentation), harsh acetic acidity (an irritating sensation similar to vinegar), and sharp acidity (piercing and biting).

Of course, some coffees have almost no acidity, such as dark-roasted Mandheling.

- Sweetness

Sweetness is very intuitive; it refers to the degree of sweetness. Humans are naturally unable to resist sweetness, and sweetness prompts the brain to release dopamine, making people feel pleasure. The same goes for coffee—the sweeter the coffee, the better it usually is. (This refers to the coffee's own sweetness; cases where sugar is added are not within the scope of discussion.)

Whether it's a coffee dominated by acidity or one dominated by bitterness, as long as you taste carefully, you can catch a sense of sweetness in it. The sweetness of coffee is not something that can be identified by taste buds alone like eating sugar, but rather the result of taste and smell working together.

If you can't taste the sweetness of coffee for the time being, you might as well try more single-origin coffees from different origins, continuously expanding your tasting samples, and through comparison you will gradually understand what coffee sweetness is really about.

- Mouthfeel

Drinking coffee involves not only taste and smell but also touch. The touch here refers to the mouth and tongue's perception of the coffee's texture, that is, mouthfeel.

Generally, higher-quality coffee can give you a certain "thickness," like the clear texture you feel when drinking yogurt. We usually describe it as full-bodied, smooth, substantial, and delicate.

Poor mouthfeel, on the other hand, manifests as thin and watery, or with a gritty roughness. These are all easy to notice.

- Aftertaste

Some friends are used to chatting while drinking coffee, which actually makes them miss the moment to feel the aftertaste. Aftertaste refers to the sensation when the aroma returns to the mouth and nasal cavity after the coffee is swallowed.

When drinking coffee, after swallowing, you can close your mouth and slowly exhale through your nose to experience the aftertaste. The most common types of aftertaste include fruity tea aroma, light floral notes, honey sweetness, and caramel cocoa aroma. One thing to add here: the so-called lingering sweetness does not belong to the category of aftertaste.

- Off-flavors

Off-flavors refer to tastes that clearly should not appear in normal coffee, and these are also very easy to identify. What we commonly call off-flavors include earthy mustiness, sawdust, medicinal notes, rubber, burnt bitterness, and astringent bitterness.

If a cup of coffee does not have these unpleasant off-flavors, we would say the cup is clean and well-layered.

Tasting coffee does not require you to be able to describe flavors; as long as you can tell whether the coffee tastes good and can explain why, that is already enough!

The above content is compiled by CoffeeHunters, a coffee news website.