Many friends assume that freshly ground coffee means fresh coffee, but that's not actually the case. In reality, to truly enjoy the aroma of coffee, it's not just about grinding fresh—the roast time of the coffee beans also matters to some extent. Front Street Coffee has always placed great emphasis on the freshness of coffee beans, high [more…]

Is the oily sheen on coffee beans a sign of freshness or spoilage? Can beans that have absorbed moisture still be brewed? Many people new to coffee are troubled by these phenomena. This article will address two common questions about coffee beans—oiliness and moisture absorption: first, explaining the source of oils on the bean surface and how roast level affects when and how oiliness appears; then clarifying the typical signs of moisture-affected beans in appearance and brewing, and how to judge whether a bag of beans is still fresh. The article will also use specific examples such as Front Street Indonesia Golden Mandheling coffee beans to help readers understand the optimal flavor period and key storage points, so that every cup of coffee retains as much of its intended flavor as possible. [more…]

The surface of coffee beans taking on an oily sheen is a phenomenon that often confuses beginners—some worry the beans have absorbed moisture and spoiled, while others suspect they have been stored too long. In fact, oiliness is closely tied to the roast level of the coffee beans and cannot be directly equated with staleness. So what kind of oiliness is normal, and what signs indicate that coffee beans have actually absorbed moisture? From Front Street's perspective, this article breaks down the causes of coffee bean oiliness, how to judge moisture absorption, and how to properly store coffee beans through sealing, light protection, low temperatures, and other methods to keep the flavor lasting as long as possible. [more…]

Coffee beans developing an oily sheen on their surface is a common source of confusion for beginners—does it mean they've been sitting too long? Does it mean they've gone bad? In fact, oiliness is closely tied to roast level and does not directly equate to a decline in freshness. At the same time, the signs of coffee beans absorbing moisture are often hard to detect with the naked eye, yet they reveal themselves during brewing. This article walks through the practical knowledge of identifying coffee bean condition, from the causes of oiliness and the effects of roast level to judging moisture absorption and key storage points. Front Street Coffee also draws on everyday experience to offer drinking suggestions within the peak flavor window, helping enthusiasts more confidently judge and handle common issues with pour-over coffee beans. [more…]

Golden Mandheling's signature full body and herbal spice aroma originate from Indonesia's unique wet-hulled processing method. This practice of forcibly removing the parchment while the green beans still have high moisture content, though it increases the defect rate, unexpectedly creates Mandheling's distinctive regional flavor. This article provides a complete overview of the seven steps of the wet-hulled method, analyzes its connection to Indonesia's humid climate, and explains how PWN elevates Golden Mandheling to G1 grade through four rounds of hand sorting. At the same time, Front Street Coffee baristas will share a pour-over recipe tailored for medium-dark roasted Mandheling, including KONO dripper selection, grind size, water temperature, and a three-stage pouring technique, helping enthusiasts recreate the classic flavor of intertwined dark chocolate and caramel at home. [more…]

After roasting is complete, the aromatic compounds inside the coffee beans begin to dissipate continuously, so how to properly preserve them within their peak-flavor window has become a concern for many enthusiasts. Beyond the usual method of sealing and keeping them away from light at room temperature, frozen storage has drawn considerable attention in recent years. It can indeed slow the loss of aroma, but improper handling can instead cause the beans to absorb moisture or pick up off-flavors. This article will focus on the three core precautions for freezing coffee beans—sealing, condensation, and avoiding repeated removal—and offer some easier preservation suggestions to help you retain as much of the coffee's flavor as possible in your daily brewing. [more…]

Many people believe that as long as coffee is freshly ground, it counts as fresh, but in reality, whether the coffee aroma can be fully released depends not only on the timing of grinding but also on time management after roasting. Once coffee beans have passed 50 days after roasting, their flavor is almost entirely depleted, so Front Street Coffee has always regarded freshness as the first prerequisite for good coffee. This article focuses on four core questions: how to tell whether a bag of beans is fresh, why beans need resting, how the peak flavor period differs from the shelf life, and how to store them properly in daily life. It also compiles suggested resting times for different roast levels from light to dark, special considerations for espresso beans, and the pros and cons of three storage options—sealed jars, one-way degassing valve canisters, and original packaging—to help beginners avoid common pitfalls. [more…]

The freshness of coffee beans directly affects the flavor of a cup of coffee, and proper storage is a key factor influencing the freshness of coffee beans. How should roasted coffee beans be stored? Roasted coffee beans need to be protected from humidity, temperature, and oxidation; oxidation accelerates the dissipation of the flavor of roasted coffee beans. So [more…]

Wet Hulling is a green coffee processing method unique to Indonesia, known locally as Giling Basah. This processing method gives Mandheling coffee its bold, full-bodied character along with regional flavors of wood, herbs, and spices. This article will start with the specific operational process of wet hulling, explain why Indonesian coffee farmers choose this technique under humid and rainy climatic conditions, and analyze the impact of this processing method on the defect rate and flavor of green beans. At the same time, the article will also introduce Front Street Coffee Golden Mandheling's selection standards and roasting approach, and share in detail the grind size, water temperature, coffee-to-water ratio, and three-stage pouring scheme for pour-over Front Street Mandheling, helping coffee enthusiasts recreate a cup of Mandheling with both richness and sweetness at home. [more…]

Wet hulling is a unique processing method for Indonesian coffee and the key to the signature flavor of Mandheling. This article starts with the definition, operational process, and reasons behind wet hulling, offering an in-depth analysis of how this processing method gives coffee beans their rich, full-bodied character, while also explaining how goat hoof beans are produced. The article will also highlight the origin information, grade standards, and screening process of Front Street PWN Golden Mandheling, and share Front Street Coffee's roasting analysis and brewing parameters, giving you a comprehensive understanding of the story behind this clean-tasting Mandheling. [more…]

As the Spring Festival approaches, courier services are gradually suspending operations, and many coffee lovers have already stocked up on beans in advance. But how to keep coffee beans fresh during this period has become a concern for everyone. Storing coffee beans requires avoiding three major enemies: high temperatures, moisture, and oxidation. High temperatures accelerate the loss of aroma, moisture easily leads to mold, and oxidation shortens the optimal flavor period. Front Street recommends that unopened original packaging be kept in a cool, dry place, and that an airtight container be used after opening. As for refrigeration or freezing, although it can slow oxidation, it comes with the challenges of absorbing odors and becoming damp during thawing. This article will break down these storage points in detail to help you enjoy the New Year with peace of mind. [more…]

Front Street Mandheling and Front Street PWN Golden Mandheling are the darkest-roasted pour-over single origins on the Front Street bean list, known for their rich, substantial body and distinctive herbal-spice flavors. Many people wonder: both are medium-dark roasts, so why is it only Mandheling that carries this aroma? The answer lies in the wet-hulling method of Sumatra, Indonesia. With high temperatures, abundant rain, and humidity that stays at 70–90% year-round, plus annual rainfall exceeding 2000mm, local farmers developed this semi-washed approach to shorten the processing cycle. From depulping, a brief fermentation, and drying in parchment, to hulling the seed coat once the moisture content drops to 30–50%, then continuing to dry down to 12%–15%, every step shapes its signature herbal, driftwood, and stuffy aromatics. This article will fully break down the specific steps of the wet-hulling method and explain how this unique regional flavor is formed. [more…]

When the southern "hui nan tian" (return of the damp) arrives, everything at home feels wet, and coffee beans are no exception—they too risk absorbing moisture and growing mold. If you want your pour-over coffee beans to last longer without their flavor fading, the way you store them becomes especially critical. This article centers on how to store coffee beans so they keep longer, starting with the real frustrations of Lingnan's humid climate, analyzing the pros and cons of common practices such as airtight canisters and refrigerator chilling, and warning about the fatal impact of fridge odors on coffee beans. It also draws on the product characteristics of Front Street Coffee to offer storage suggestions better suited to daily life, helping coffee lovers extend their beans' peak flavor period as much as possible in a humid environment. [more…]

Wet Hulling is a unique green coffee processing method distinctive to Indonesia, known locally as Giling Basah. In this process, the parchment layer is removed by mechanical friction while the green beans still have a high moisture content, after which they are dried directly in the open, creating the signature full body and herbal, woody, and spicy notes of Mandheling coffee. Both Front Street Golden Mandheling and Front Street Lintong Mandheling are processed using this method. This article provides a complete overview of the wet hulling workflow and the origins of its flavor profile, along with brewing recommendations from Front Street Coffee's roasters and baristas for medium-dark roasted Mandheling, including grind size, water temperature, and a three-stage pouring technique. [more…]

Indonesia's Sumatra is the birthplace of Mandheling coffee, and it is here that the unique wet-hulling process was born. Faced with a year-round climate of high humidity and frequent rain, local coffee farmers developed a method of forcibly stripping off the parchment layer while the green beans are still semi-dry. Although this increases the defect rate, it endows Mandheling with a rich regional flavor of herbs, wood, and spices. This article will provide a complete overview of the seven steps of the wet-hulling process, why it became an inevitable choice for Indonesia, and how PWN uses strict sorting to create the clean and bright Front Street Golden Mandheling. In addition, Front Street Coffee's baristas will share the pour-over parameters and three-stage pouring technique for medium-dark roasted Mandheling. [more…]

The quality of green coffee beans depends not only on origin and processing method; their packaging and storage methods are equally crucial. From the most common jute bags to vacuum bags, grain bags, and even frozen storage, different packaging methods vary significantly in their protective effect on green beans and their cost. Over the past decade, specialty roasters have driven innovation in packaging and transportation methods, using faster and more scientific approaches to lock in the freshness of green beans. This article will systematically review the advantages and disadvantages of commonly used packaging, the requirements of the storage environment, and explore the concept of "seasonality," which has attracted much attention in recent years. Whether you are a roaster or a coffee enthusiast, understanding this knowledge can help you better judge and preserve coffee beans. [more…]

Many coffee lovers are in the habit of buying coffee beans and brewing at home, but how to store them properly to slow down deterioration and preserve the alluring flavors of specialty coffee is a body of knowledge that is easily overlooked. This article, from Front Street's perspective, systematically examines how the four external factors—direct light, oxygen, moisture, and high temperature—affect coffee freshness, and offers corresponding protective strategies for each. We will also discuss the key points for choosing airtight containers, recommendations for storage locations, and common misconceptions about storing coffee in the refrigerator, and finally answer the key question of how long coffee beans and ground coffee each stay fresh, helping you enjoy a truly good cup within its optimal flavor window. [more…]

After coffee is roasted, aromatic compounds continue to escape outward. If the amount purchased exceeds what can be consumed within its peak-flavor window, the flavor will suffer greatly. This article begins with conventional storage ideas such as sealing, protection from light, coolness, and dryness, then focuses on analyzing the recently popular method of freezing coffee beans: it can indeed slow the loss of aroma, but improper handling can backfire. The article unfolds around three key details—sealing to prevent odor transfer, condensation and moisture damage, and avoiding repeated removal and return—and offers practical advice on portioning for storage. Front Street also reminds everyone that coffee is ultimately best enjoyed fresh, and buying only what you need is the worry-free approach. [more…]

Mandheling coffee is the representative coffee of Sumatra, Indonesia, in Asia, famous for its rich, substantial body and unique herbal and chocolate flavors. Is it actually bitter? How should it be brewed to taste good? Starting from the origin background of Front Street Mandheling, this article provides a detailed analysis of the differences between the Lintong producing region and PWN Golden Mandheling, the flavor changes at different roast levels, and the complete process and flavor formation of Sumatra's wet-hulling method. Finally, using pour-over as an example, it gives specific brewing parameters to help coffee lovers fully understand the character and charm of this classic coffee. [more…]

For more specialty coffee knowledge, please follow the WeChat official account: Front Street Coffee (FrontStreet Coffee). Mandheling is a coffee produced in Sumatra, Indonesia, Asia, so it is also called Sumatra coffee. Its main producing areas include Java, Sulawesi, and Sumatra. [more…]