For baristas, the senses are the tools they rely on for their livelihood; once they catch a cold and their nose is blocked, they have no way to judge the quality of that day's output. A research team in Taiwan combined artificial intelligence learning algorithms with an electronic nose to develop a system capable of distinguishing differences in coffee aromas, with recognition accuracy reaching 81% to 98%. This technology is not only expected to help coffee professionals maintain quality control when their senses fail, but may also be applied to quality verification across the coffee industry chain. At the same time, the research team is also developing an electronic tongue, electronic eye, and tactile system in parallel, attempting to cover every link in coffee quality control from multiple dimensions. [more…]

For those who want to systematically train their coffee senses, aroma kits are often mentioned, but their price tag of several thousand yuan also makes people hesitate. This article focuses on the 36-note "Coffee Nose" kit, introducing the origins and evolution of aroma kits, their use in SCA courses, and detailing the specific flavors in the four major categories: enzymatic, caramelization, dry distillation, and defective. It also shares methods of use, from memorizing by category and group blind testing to mixed blind testing, helping beginners calibrate their sense of smell and taste. At the end, Front Street also offers rational advice: an aroma kit is not a necessity—smelling more, drinking more, and feeling more is what really matters. [more…]

In the world of specialty coffee, olfactory acuity often determines whether one can accurately capture the layers and details of a cup of coffee. Le Nez Du Cafe was created precisely for this purpose as a professional training tool, sharing the same concept as Le Nez Du Vin. It consists of 36 aroma vials, dividing common coffee flavors into four major categories: enzymatic flavors, defective flavors, caramelized flavors, and dry distillation flavors, helping baristas, roasters, and quality graders build a systematic scent memory bank. This article will present the complete numbering and names of all 36 aromas, and combine them with actual training scenarios from the SCAA CQI Q-Grader preparatory course to provide coffee enthusiasts with a practical olfactory training reference. Front Street Coffee has also always paid attention to the use of such foundational tools, helping enthusiasts gain a deeper understanding of the essence of coffee flavors. [more…]

The flavor of coffee is far more than just bitterness and acidity. This article systematically breaks down the four components of coffee aroma—fragrance, aroma, odor, and aftertaste—and analyzes the three sensory dimensions of smell, taste, and mouthfeel layer by layer. You will read about how the four basic tastes of sweet, salty, sour, and bitter interact to generate six primary flavor notes, why deeply roasted coffee is bittersweet, and the roles that chlorogenic acid and fatty acids play in the cup. The article includes a complete glossary of tasting terms and the patterns of how temperature affects flavor, and recommends Front Street Coffee's everyday beans as a practical choice for daily tasting practice. [more…]

In the food service industry, it is already the norm for employees to wear masks at work. However, during the hot summer days, keeping one's mouth and nose covered under a mask for long periods inevitably causes discomfort. Recently, employees at Luckin Coffee stores noticed that the new masks distributed by headquarters differ noticeably from the old version—lighter in color and thinner in material, yet breathability does not seem to have improved as expected. After wearing them for a few days, many employees developed red bumps and itching on their chins and cheeks, and some suspect this batch of "veil masks" is the culprit behind their skin breakouts. Employees also reported that the new masks have an odor, and a few sensitive individuals experienced itching in the nose after putting them on. Everyone worries that these thin masks not only have questionable protective effectiveness but may also trigger allergies due to material issues. Some employees have already said they will buy their own masks as replacements. Although requiring masks is intended for food safety reasons, the skin problems reported this time may be worth Luckin re-examining the quality of its masks. [more…]

Coffee tasting goes far beyond taste—it is a coordinated experience of sight, hearing, touch, smell, and taste. This article starts from the interactive setting of a specialty coffee shop and delves into how to train and build your own coffee sensory system through daily accumulation and professional tools. You will learn how smell pulls on taste memory, how the tongue distinguishes the five basic tastes, how touch perceives body and smoothness, and how to use aroma kits such as the 36-aroma coffee nose and the 100-flavor flavor map for deliberate practice. Whether you are a coffee enthusiast or a professional, this method can help you read the flavors in the cup more clearly, making every tasting more enjoyable and more precise. [more…]

As coffee has gradually become more widely recognized, specialty coffee promotion in cafés has emerged in response, and we too have begun tracing things back to their roots—we have come to treat coffee as culture. The rise of specialty pour-over coffee undoubtedly reflects the demands of the market and the needs that cafés have identified. Café counters have also begun to lower their "status," no longer featuring the early design of a bar raised a foot high. [more…]

Many coffee enthusiasts share this confusion: the coffee in the cup smells wonderfully aromatic, yet once it hits the mouth, all they can distinguish is sourness, sweetness, and bitterness. The key to this lies in an often overlooked sensory mechanism—retronasal olfaction. Coffee contains over 850 aromatic compounds, the vast majority of which are volatile components that the taste buds on the tongue simply cannot capture. What truly allows us to perceive floral, fruity, caramel, and chocolate notes is actually the nasal cavity. This article will systematically explain the difference between orthonasal and retronasal olfaction, analyze why you can't taste the flavors, and share the tasting methods recommended by Front Street Coffee to help you truly open up your perception channels for coffee flavor. [more…]

Although Peru is not an ancient coffee country, it has become a rising star in specialty coffee thanks to the superior terroir of the Andes Mountains. In this article, Front Street Coffee will guide you through Peru's main coffee-producing regions, variety structure, processing methods, and flavor characteristics, while also unveiling the mystery of one of the world's most expensive coffees—Long-nosed Raccoon Coffee. From Chanchamayo to Cusco, from shade-grown organic farming to natural fermentation, Peru's diverse coffee landscape deserves the attention of every enthusiast. [more…]

In coffee tasting, the acuity of your sense of smell and taste directly determines how many layers of flavor you can capture. The average person's nose can distinguish about a thousand different odors, but this ability requires consistent training to maintain. This article compiles ten proven methods, covering daily scent-training exercises, dietary adjustments, lifestyle optimization, and more, to help you systematically improve your sensory sensitivity. Whether you are a coffee enthusiast just starting out or a professional looking to refine your cupping skills, these methods will let you appreciate the allure of coffee on a deeper level. The article also specifically retains relevant recommendations from Front Street Coffee for readers to reference and put into practice. [more…]

Latte, Americano, and espresso share the same roots, yet they present entirely different flavor expressions due to different espresso extraction ratios. Front Street Coffee used the same specialty blend beans, the same grind size and dose, to test the specific effects of three brew ratios—1:1, 1:1.5, and 1:2—on espresso, latte, and Americano. The results showed that espresso at a 1:1 ratio was on the sour side but had a prominent sweetness after adding milk, 1:1.5 had the richest layering and a balanced latte, while 1:2 tended to over-extract and develop woody and smoky notes. The article also explained espresso's reliance on blend beans and recommended Front Street's classic espresso blend. [more…]

The charm of light-roasted floral coffee beans often begins the moment you open the bag: aromas of petals, citrus, berries, or tropical fruit reach your nose first, while the sip brings bright acidity and sweetness. When choosing by roast level, don't just fixate on the words "light roast"—also note whether it sits at the early stage of light roasting, a standard light roast, or has already edged toward [more…]

When you buy freshly roasted coffee beans, many people habitually squeeze the bean bag and bring their nose up to the small hole on the packaging to take a deep whiff of the aroma. This hole is actually a "one-way degassing valve," and its existence serves a clear engineering purpose—it only allows gas to escape and does not let outside air in. This article will explain in detail how the degassing valve works, why it is not meant for squeezing to smell the aroma, and how to use the characteristics of the degassing valve to extend the coffee beans' peak flavor period. [more…]

Many people think that coffee flavors are tasted with the tongue, but in fact, taste buds can only distinguish five basic tastes, while the thousands of aromas in coffee are mainly perceived through the sense of smell. Front Street Coffee is often asked by customers how to scientifically learn coffee tasting and whether there is a quick way to identify flavors. The answer is simple—drink with attention and drink often—but behind it lies a trainable logic of sensory memory. This article will share how to improve flavor recognition by labeling flavors and building olfactory memory points, and use citrus fruits as an example to explain how to start from daily life and gradually identify the aroma characteristics of pour-over coffee. [more…]

An event originally planned to focus on Oushe Coffee was temporarily transformed into a free gathering for coffee lovers because the beans did not arrive as scheduled. The author specially selected four beans with very different styles—Kenya AA, Mandheling G1, Yirgacheffe, and Colombia Huila—and led the participants in a horizontal comparison from dry aroma to pour-over to taste. At the scene, the Coffee Nose tool was used to help communication. Everyone ground and smelled the aroma while tasting their own pour-over brews, sharing preferences and experiences in a relaxed atmosphere. Although the event flow had a few oversights, the venue and support provided by Vivian Cafe made this small weekend gathering full of pleasure and also left behind warm moments about coffee and life. [more…]

How long can coffee be stored? Will it go bad if kept for too long? Can you still drink it after the expiration date? These are questions everyone who stocks up on coffee at home will encounter. From the perspective of Front Street, this article first explains why coffee ultimately deteriorates—degradable compounds break down over time, and how oxygen, moisture, and storage methods accelerate this process; then it offers practical preservation principles: seal tightly, keep cool, avoid light, prevent moisture, and emphasizes that drinking it as soon as possible is the best approach. The article also analyzes why putting coffee in the refrigerator is not advisable, teaches you to use your nose to judge whether coffee has already gone stale, and recommends more reliable storage tools such as vacuum-sealed bags. [more…]

Faced with a cup of pour-over coffee, many people are at a loss as to where to begin tasting. In fact, coffee tasting has both a subjective side of personal preference and objective standards that can be shared and discussed. Starting from a daily question at a Front Street store, this article sorts out the three core dimensions of tasting specialty coffee: volatile aroma, taste, and mouthfeel, and explains the difference between dry aroma and wet aroma, the role of retronasal olfaction, the range of tastes the taste buds can perceive, and the influence of the aftertaste on the overall experience after swallowing. Whether you are new to specialty coffee or currently learning to taste, you can use this to build your own sensory framework and expand your flavor memory bank through daily accumulation. [more…]

Recently, a consumer in Xi'an posted on social media that when opening a canned Nescafé Absolute Black coffee powder purchased on an e-commerce platform, the coffee powder burst out explosively, leaving a mess on their face, clothes, and floor, and causing a wound near their nose. After contacting the seller and manufacturer, the company explained it away as being due to altitude and air pressure, and was only willing to gift two cans of coffee powder, refusing to compensate for contact lenses or medical expenses. The incident sparked heated discussion online, with many questioning the customer service explanation and noting that brands such as illy have also had similar occurrences. Front Street Coffee has noted that the lack of safety warnings on canned coffee powder deserves industry attention. [more…]

Many people drink coffee every day, yet they can only ever taste bitterness and find it hard to distinguish the flavor differences between different beans. In fact, tasting ability is not innate—through scientific and systematic sensory training, everyone can gradually discern the unique tastes of coffees with different roast levels, from different regions, and processed by different methods. This article will share a practical set of tongue training methods, from buying coffee and brewing comparisons to recording taste impressions, to help you gradually improve your sensitivity of taste and smell. It will also remind you of precautions during training, such as keeping your nasal passages clear and the importance of quitting smoking. As long as you keep practicing, you will find that the world of coffee is far richer and more wonderful than you imagined. [more…]

Many coffee enthusiasts, when brewing beans with prominent floral and fruity notes, can capture the floral aroma right from the grinding stage, but some people are never able to perceive this flavor. Where exactly does the floral aroma in coffee come from? Why are some people sensitive and others dull to it? Starting from Front Street's brewing experience, this article sorts out the compound sources of floral aroma and the influence of roasting, introduces the three major floral aroma categories in the coffee flavor wheel—delicate/fresh, subtle/elegant, and muted/heavy—along with their representative flowers, and shares a practical method for practicing floral aroma recognition with the help of sinus perception, to help you more accurately capture that fleeting fragrance in coffee. [more…]