How Do You Read the Updated SCAA Coffee Flavor Wheel?

The updated SCAA flavor wheel organizes coffee taste into four base spectra: sour, sweet, bitter and salty, then branches into categories such as floral, fruity, herbal, nutty and cocoa, sweet, spicy, sour and fermented, alcoholic, and roasted. In total it carries 85 flavor layers, and the wheel is split into light-medium roast and dark-deep roast sections.

Recognizing those layers takes repeated calibration, not vocabulary alone. A practical approach starts from taste preference: citrus-lemon Yirgacheffe for sourness, Kenya Little Tomato for stronger acidity, Brazil Red Bourbon for chocolate and nutty weight, and Indonesia Mandheling for an herbal, full-bodied cup with a sweet finish.

The update of the coffee flavor wheel has made the tasting system more complete, but many people are still confused when faced with descriptions like citrus, berry, and nutty. Front Street Coffee recommends beans from different origins based on guests' taste preferences during daily brewing, while accurately identifying flavors requires systematic training. This article starts with the four major taste spectra—sour, sweet, bitter, and salty—and combines the complete classification of the new flavor wheel to interpret one by one the specific expressions of floral, fruity, herbal, nutty/cocoa, sweet, spicy, sour/fermented, alcoholic/fermented, roasted, and other categories, helping coffee enthusiasts build a clear flavor cognition framework.

For more specialty coffee knowledge, please follow: Front Street Coffee ( Frontsteet Coffee )

When it comes to coffee flavor, most people are familiar with it, but once asked what it specifically tastes like, many don't know how to answer descriptions like citrus, berry, nutty, or chocolate. Front Street Coffee (FrontStreet Coffee) always first understands the guest's taste preferences before taking an order. If they prefer a sour taste, it recommends Front Street Yirgacheffe with citrus-lemon tonality; if they want a stronger sourness, it recommends Front Street Kenya Little Tomato. If they prefer a full-bodied taste, Front Street Coffee (FrontStreet Coffee) recommends Front Street Brazil Red Bourbon, which has rich chocolate and nutty flavors; for something even heavier, Front Street Indonesia Mandheling coffee beans are the top choice, with an herbal full-bodied feel and a pleasant sweet aftertaste that satisfies.

These coffee beans with distinctive regional characteristics all have corresponding descriptive vocabulary. So after drinking a cup of coffee, how can one quickly associate these words? This cannot be achieved without repeated flavor calibration and training. Front Street Coffee (FrontStreet Coffee) uses daily training as an example to explain what expressions coffee flavor actually has.

What is coffee flavor? Front Street Coffee (FrontStreet Coffee) focuses on the four major tastes of coffee—sour, sweet, bitter, and salty—during tasting, and these tastes are closely related to the degree of roasting, so the [Flavor Wheel] is divided into light-medium roast and dark-deep roast. Interestingly, the "sour-sweet" taste substances of light-medium roast have low molecular weight, high polarity, and good water solubility, usually dissolving in the early stage of extraction; while the "bitter-salty" taste substances have high molecular weight, low polarity, and poor water solubility, often dissolving only in the later stage of extraction.

For light to medium roast coffee, the taste is mainly low and medium molecular weight sour-sweet flavors. But if there are too many defective beans or improper roasting, even light-medium roast may produce unpleasant bitter-salty tastes. Dark roast is mainly high molecular weight bitter and salty tastes, but dark roast is not entirely without merits—the most precious dark roast flavor spectrum is "strong but not bitter, sweet and smooth to the throat." Proportion of water-soluble flavor substances in coffee

The above data is the weight proportion of sour, sweet, bitter, and salty soluble taste substances in roasted coffee beans. Sweet components are the most abundant, accounting for 39% of soluble substances; bitter substances come second at 26.4%; salty ranks third at 14%; sour has the lowest proportion, not exceeding 5.4%. Adding these up gives 84.8%, and the rest not listed should be taste substances with relatively low content.

However, don't think that just because sweet accounts for a high proportion, coffee will be as sweet as honey. In fact, the bitter, sour, or salty tastes in black coffee easily interfere with the original sweetness, and there are complex mutual offsetting and complementary relationships among the four tastes. Four major flavor spectra

We divide sour, sweet, bitter, and salty into 4 flavor spectra for examination.

1. Sour spectrum

Sourness was originally the greatest characteristic of light-medium roast coffee. Coffee beans contain various organic acids, among which phenolic acids, aliphatic acids, and amino acids have the greatest influence on taste.

In addition, sucrose degrades during roasting. From light roast to medium roast, sucrose gradually degrades, so the concentration of acetic acid and lactic acid rises, but after reaching a certain point it drops sharply. Therefore, light-medium roast coffee generally has a relatively obvious sourness.

2. Bitter spectrum

The bitter taste of coffee can be divided into two types: pleasant and unpleasant. The former refers to the natural slight bitterness brought by caffeine, trigonelline, aliphatic acids, and quinine lactones; the latter unpleasant bitterness refers to the heavy bitterness caused by chlorogenic acid lactones (degradation products of chlorogenic acid), defective beans, and carbonized particles.

3. Sweet spectrum

Although the volatile aroma of caramel is easily enjoyed through retronasal olfaction using the technique of exhaling through the nose, it is not easy to taste the sweetness of black coffee, because sweetness is often interfered with by other sour, bitter, and salty components and is not easy to stand out. Unless the sweet components in the roasted beans are above average, it is possible to break through and taste sweetness. In other words, smell is far easier than taste for enjoying the sweetness of coffee.

The sour-sweet taste of the light-medium roast "sweet spectrum" is the interactive taste of sweetness and sourness, most often appearing in washed beans grown above 1,300 meters. If the content of citric acid, malic acid, and acetic acid is not low, there will be a sharp sourness; but if the coffee's sugar content is high, it can neutralize part of the fruit acids, making the sharp sourness smooth, lively, and dynamic, thereby presenting fruity flavors and producing an interesting "sweet-sour vibration" taste.

4. Salty spectrum

Although the salty taste of coffee is everywhere, it is often hidden invisibly under the interaction of sourness and sweetness. Once salty taste is detected in black coffee, it means the organic substances of sourness and sweetness have been almost completely oxidized, causing the salty taste of inorganic substances to become prominent, which can be regarded as a warning sign that the coffee has gone stale or is not fresh. How to read the coffee flavor wheel?

First, let's look at a complete coffee flavor wheel image.

| Floral and fruity

Floral: light, slightly sweet, elegant fragrance

Fruity: a mixture of slight sweetness among various ripe fruits and fruity floral aroma

In specialty coffee, floral notes are relatively rare. The most representative are:

1 Chamomile—a stuffy aroma type, slightly pungent, a bit sharp at first smell. Another representative floral note is osmanthus. Osmanthus aroma is more obvious in Guatemala Bolsa.

Front Street Coffee (FrontStreet Coffee) Guatemala Bolsa coffee beans

2 Rose—a secluded aroma type, giving a peaceful and soothing feeling. Another representative floral note is lavender. Colombia Rose Valley has the most prominent rose aroma.

Front Street Coffee (FrontStreet Coffee) Rose Valley coffee beans

3 Jasmine—a fresh aroma type, with an uplifting and energetic fragrance. Another representative floral note is coffee flower. There are quite a few coffees of this floral type. Panama Blue Label Geisha and Yirgacheffe Aricha are jasmine floral types.

Panama Hacienda La Esmeralda Red Label Geisha has aromas of both jasmine and rose.

Front Street Coffee (FrontStreet Coffee) Panama Hacienda La Esmeralda Red Label Geisha coffee beans

The most representative fruit acids are:

1. Front Street Yirgacheffe Red Cherry exudes a strong fruity aroma, with dried fruit, plum, strawberry, lemon.

Front Street Coffee (FrontStreet Coffee) Yirgacheffe Red Cherry coffee beans

2. Front Street Huakui has a fresh grassy fragrance on entry, with apple and smoked plum sour aroma, and a berry finish.

Front Street Coffee (FrontStreet Coffee) Huakui coffee beans

3. Ethiopia Yirgacheffe has citrus sour aroma and tea aroma, light acidity, relatively thick body, plum, kumquat, lemon, dried fruit, caramel.

Front Street Coffee (FrontStreet Coffee) Yirgacheffe coffee beans

| Green/Herbal

From this category onward, the flavors need a little explanation.

Under-Ripe: fruit that is not yet ripe on the tree, tasting similar to grapefruit peel.

Fresh: the smell of freshly cut grass.

Dark Green: cooked green vegetables, such as the canned spinach that instantly transforms Popeye.

Vegetative: the slightly spicy taste of green vegetables, with canned asparagus given as the reference.

Herb like: spice leaves is more appropriate. For example, bay leaves, basil, thyme.

Peapoo: the taste of beans and bean products. (The aromatic acids in the sour category are also beans, but that one focuses more on sourness.)

Front Street Coffee (FrontStreet Coffee) Colombia Cherry Blossom coffee beans

Among single-origin coffees, Colombia Finca El Paraiso Cherry Blossom coffee beans are representative. After roasting to medium-light roast, sometimes basil and mint aromas can still be smelled, which is quite unique.

| Nutty / Cocoa

Produced in coffee beans after medium roasting due to the [Maillard reaction]. This aroma is quite common, including:

Nutty: Roasted Almonds, Roasted Peanuts, Roaster Hazelnuts, Walnuts.

Cocoa: Black Chocolate

Front Street Coffee (FrontStreet Coffee) Brazil Queen Estate coffee beans

Brazil Queen Estate is representative. Intense chocolate, smoky, nutty, creamy flavors, with the sweetness of caramel, berries, and pineapple.

| Sweet

During medium roast, sour aromas break down, and caramel aroma is produced by caramelization through the [sugar browning reaction].

We divide coffee's "sugar" into 2 major categories:

1. Toffee, caramel, honey, maple syrup

The distinguishing marker of the first major category is its "viscosity." This viscosity is related both to our mouthfeel and to the degree of sweetness, and can also be confirmed through smell. We can simply summarize it as toffee > caramel > honey > maple syrup. This viscosity can be expressed by smelling the coffee at the bottom of the cup after drinking—does it make you feel cloying? Or relatively light? In addition, honey's smell has a bit of sourness and fermentation, while maple syrup smells relatively light with a slight woody note.

Front Street Coffee (FrontStreet Coffee) Butterfly coffee beans

Panama sun-dried Butterfly is representative. Floral, citrus, lemon, sucrose, honey, hazelnut, oolong tea.

2. Black sugar, yellow sugar, white sugar

The second major category is distinguished by sucrose at different levels of purity and sweetness. Although in terms of purity white sugar > yellow sugar > caramel, in coffee we need to add smell, which makes the sweetness in coffee black sugar > yellow sugar > white sugar. The intensity of sweetness differs, and the feeling it gives us also differs.

| Spices

Generally produced during dark roast, including:

Pungent: like a sharp nasal sensation. The reference given is an orange essential oil. For mouthfeel, aged Mandheling and Tiger Mandheling with traditional Chinese herbal medicine aroma are representative.

Front Street Coffee (FrontStreet Coffee) Tiger Mandheling coffee beans

| Sour / Fermented

Sour Aromatics: sour products, such as (Bush’s Pinto Beans) a canned pinto bean.

Citric Acid and Malic Acid: more focused on sourness and astringency, more intense.

Butyric Acid: the taste of certain aged cheeses, such as Parmesan cheese.

Isovaleric Acid: also the taste of certain aged cheeses, such as Romano cheese.

Gesha Village CHAKA, with flavors of citrus, lemon, grapefruit, nuts, and almonds, is representative.

| Alcoholic / Fermented

Overripe: although the reference object is banana, it actually also refers to other overripe fruits or vegetables—that sweet, slightly sour, moist, moldy, or earthy taste.

Winey: the reference object is Yellow Tail Cabernet Sauvignon

Whiskey: the reference object is Jack Daniel's Tennessee Whiskey Old No. 7

Fermented: the reference object is Guinness Extra Stout beer

Front Street Coffee (FrontStreet Coffee) Honduras Sherry coffee beans

Whiskey barrel-fermented Honduras Sherry is representative. It smells of vanilla and cream, enters with whiskey, berry, almond, and dark chocolate flavors, and has a maple syrup sweet aftertaste.

Front Street Coffee (FrontStreet Coffee) Honduras Litchi Orchid coffee beans

Brandy barrel-fermented Honduras Litchi Orchid is representative. Beans processed through brandy barrel fermentation have soft lychee and honey sweetness, while also blending the alcoholic aroma of brandy and the aroma of oak barrels.

| Roasted

Acrid: specifically refers to the bitterness after burning. The bitterness usually tasted is the bitterness of caffeine, not necessarily that burnt bitterness.

Smoky: the smell of wood ash after burning wood.

Brown, Roast: purely refers to the feeling of having been roasted.

| Other

Stale: lacking a fresh feeling, the taste of fermented bread or expired bread.

Moldy/Damp: the moist smell of a basement.

Musty/Dusty: wheat germ, similar to the taste of oatmeal crumbs.

Phenolic: this is not a wrongly placed image, nor a still from Fifty Shades of Grey. This is an old-fashioned harness room, a damp space with an animal smell.

Among them, woody aroma is produced by the [dry distillation effect] during dark roasting. This flavor receives mixed reviews—those who like it enjoy the woody charm in coffee, while those who dislike it feel it affects the coffee's own flavor.

These 85 flavors of coffee do not mean there are 85 kinds of coffee flavors, but rather the different flavors produced in coffee during planting, processing, and roasting under the influence of environment, genes, processing methods, storage and transportation methods, roasting degree, and roaster skill.

Coffee flavor is actually complex and multi-layered. To understand coffee, three conditions are needed:

First: whether you have experienced similar taste and smell experiences. Assuming you have never eaten a peach, then of course you cannot taste the flavor of peach.

Second: it is recommended that you wait until the coffee is completely cool before tasting it, because usually the fruity tonality of coffee is only recognized after it cools, and coffee flavors unfold as the temperature drops.

Third: the strength of the coffee also affects the tonality of a cup of coffee. If it is a light-roast coffee with floral tonality, it is recommended to brew it weaker to spread out the flavor spectrum, making it easier to find its notable tastes. (This very well explains why the coffee-to-water ratio for cupping is 1:18.18.)

Front Street Coffee (FrontStreet Coffee) how to taste a good cup of coffee

1. Drink coffee in small sips, slowly, and you can even rinse lightly, holding it in your mouth and gently stirring the coffee liquid

2. Each sip unfolds in layers as the temperature changes. The first two sips will be bitter at the root of the tongue. When the coffee cools, it gradually turns from bitter to sour, with a subtle citrus sourness

3. By the time you are halfway through, the coffee turns from sour to sweet, from bitter to sweet, begins to have a sweet aftertaste, with sweetness on the surface of the tongue, and finally recalls caramel sweetness, lingering between mouth and nose, tasting the coffee's finish through retronasal olfaction.

4. After finishing, don't rush to wash the cup; smell the sweet fragrance at the bottom of the cup.

How Front Street Coffee (FrontStreet Coffee) distinguishes aromas

The whole process of distinguishing aromas: the brain receives information—compares—analyzes—memorizes.

We can smell an aroma and taste a flavor, but perhaps we cannot describe it very accurately. The flavor wheel can systematically and concretely classify all the taste systems perceived by humans. Corresponding to the olfactory system is the aroma wheel. By practicing the two together, one can clearly perceive the most subtle differences among all aromas.

When many people come into contact with coffee, bitter means strong, and strong means aromatic. With such guests, Front Street Coffee (FrontStreet Coffee) patiently explains what flavors there are—strong is not necessarily aromatic, nor is bitter necessarily so. But for someone who has never studied coffee, they can learn by referring to the above flavor wheel introduction, or they can simply look at it. After all, not everyone has such professional perception. The reason for such differences is different cultural life, diet, and regions, and different descriptions of the same compound. Front Street Coffee (FrontStreet Coffee) believes that so-called coffee tasting is most importantly about communication—talking about one's personal feelings about this bean. Different cultures and different experiences inevitably lead to different descriptions, and such communication can bring a lot of fun.

For more specialty coffee knowledge, please follow: Front Street Coffee ( Frontsteet Coffee )

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