When brewing coffee, water quality, cooling methods, and tasting cup types are often treated as independent variables, but can combining all three lead to more significant sensory improvements? Front Street Coffee designed a controlled experiment using Huakui beans as samples: one group used regular mountain spring water, no ice ball, and a standard espresso cup, while the other used a custom water concentrate, a Paragon ice ball, and an aromatic tasting cup, with completely identical brewing parameters. Through concentration measurements and blind tasting, the actual contributions of these tools at different stages were verified. This article documents in detail the TDS control of the custom water concentrate, the cooling mechanism of the Paragon ice ball, and the aroma-concentrating effect of the tasting cup, and invited colleagues and customers to participate in a blind selection. The final results were highly consistent, providing coffee enthusiasts with a reproducible reference for combined techniques. [more…]

The Paragon ice ball, which made its debut at the WBC Brewing Championship, claims to lock in 40% of volatile aromatics, making coffee flavor fuller. It preserves aromatic compounds by cooling the extracted liquid, but how does it actually perform? Front Street Coffee conducted a comparative brew using Panama Boquete Geisha, one regular and one with the ice ball, tasting from temperature to aroma to acidity one by one. The results revealed that the ice ball's main function is actually to lower the coffee's temperature, reducing sensory obstacles caused by high heat. Is it worth buying? This article reveals the answer for you. [more…]

On the journey to pursue a good cup of coffee, besides high-quality beans and skilled technique, some seemingly inconspicuous auxiliary gadgets often play a finishing touch. Front Street Coffee has previously introduced sharp tools such as latte art needles and WDT needles. Today, continuing with the theme of coffee auxiliary tools, we will review the uses and methods of the secondary dispersion screen, Paragon ice ball, Lily Drip, dosing funnel, extraction observation mirror, and a silencing air blower. These tools help coffee enthusiasts and professionals complete brewing more calmly from the perspectives of even extraction, locking in aroma, improving puck distribution, enhancing operating cleanliness, making it easier to observe extraction status, and reducing noise. Whether you are a beginner just starting out or an advanced player pursuing details, you can find a practical solution that suits you. [more…]

In the world of specialty coffee, flavor expression has always been the shared pursuit of enthusiasts and professionals alike. Beyond selecting quality beans, all kinds of extraction aids keep emerging, among which the Paragon golden ball created by world champion Sasa Sestic stands out. It claims that by rapidly cooling the coffee liquid, it can retain 40% more aroma. Is this a marketing gimmick or does it actually work? Front Street Coffee will walk you through how the Paragon works and, through actual brewing comparisons, verify the real impact of this little golden ball on coffee flavor. If you have ever wondered about the connection between aroma and flavor, or hesitated over whether it is worth buying, the experiments and analysis in this article may give you an answer. [more…]

2015 WBC champion SaSa Sestic returned as runner-up in the 2022 Australian Brewers Cup, bringing with him a brand-new brewing device called the Paragon—a specially made ice rock mounted in the middle of the dripper to lock in the volatile aromatics in the coffee liquid. According to Sasa, this invention is the result of collaborative research with Professor Jahan and the Swiss Coffee Center of Excellence, and it can capture up to 40% extra aromatics through rapid cooling during the first and middle stages of extraction. However, the official price of this brewing stand plus metal ice rock is as high as $4,292, equivalent to more than 30,000 RMB, which has sparked a lot of discussion among coffee enthusiasts. Bloggers on YouTube have already begun hands-on testing and found that its core component is similar in principle to the food-grade stainless steel ice cubes commonly seen in bars, while similar products on Taobao cost only a few dozen yuan. So what exactly makes this ice rock so special? When brewing the same Geisha with a V60 paired with the Paragon versus a plain V60, the TDS rises from 1.27 to 1.37—what differences are there in flavor performance? This article will explain it all in detail for you. [more…]

Conventional wisdom holds that preheating a coffee cup slows the rate at which coffee cools, helping maintain an ideal drinking temperature. However, as understanding of the relationship between temperature and flavor perception deepens, more and more coffee professionals have begun serving coffee in room-temperature or even chilled vessels—especially in summer, since this not only prevents burning the mouth but also allows the layers of flavor to be captured more clearly. It was on this basis that Sasa Sestic, founder of the Origin Project, developed the Paragon ice ball, which locks in aroma through instant cooling. So, if the cup receiving the coffee is chilled, could a similar effect be achieved? Front Street Coffee put this to the test, using chilled vessels to make espresso and pour-over coffee respectively, exploring the actual impact of low-temperature vessels on flavor presentation. [more…]

In the past two years, a coffee processing method called "rapid chilling to lock in aroma" has become popular in competitions and among enthusiasts, shared and promoted by Sasa Sestic, with the core tool being the Paragon chiller ball. It works by rapidly lowering the temperature of the coffee liquid to slow down aroma volatilization, theoretically preserving more flavor. But how effective is it really? Why do most competitors only rapid-chill the first portion of the coffee liquid? Front Street conducted a comparative test using a pour-over of Huakui and a Strawberry Candy espresso, and found that the aroma difference in the pour-over group was not obvious, while the espresso group showed mouthfeel differences due to temperature changes. This article will break down in detail the principle of rapid chilling to lock in aroma, the results of the comparative experiment, and the two major reasons for only chilling the first half, helping coffee enthusiasts view this technique rationally. [more…]

Should you add ice first or ice last when making iced pour-over coffee? This question may seem like a mere difference in procedure, but behind it may lie the preservation and release of coffee flavors. Front Street Coffee once mentioned the Paragon ice ball in an article; its principle is to lock in volatile aromas by rapidly cooling the coffee liquid, allowing the drinker to experience a richer coffee flavor. Inspired by this, we restarted the experiment, using the same Colombian Frontera Estate washed Geisha, to compare the differences between adding ice first and adding ice last in iced pour-over coffee in terms of operation, temperature, aroma, and taste. The experiment strictly controlled the ratios of coffee grounds, water, and ice, and corrected for differences in tasting time. What was the final result? Is there really an obvious difference between the two? This article will reveal the answer for you. [more…]

Coffee aroma is volatile, and the higher the temperature, the faster it dissipates, so some have proposed using low-temperature containers to lock in the aroma. Front Street Coffee compared three types of pour-over coffee vessels—a high-temperature cup, a room-temperature cup, and a frozen cup—to test whether cup temperature truly affects coffee aroma and flavor performance. The experiment used Kenya Asaliya coffee beans with uniform brewing parameters, and the results showed that cup temperature mainly changes the temperature of the coffee when it enters the mouth, rather than the amount of aroma, but temperature differences do indeed cause noticeable changes in flavor perception. This article will present the experimental process and conclusions in detail, and offer cup selection suggestions for different weather conditions. [more…]

In the preparation of iced pour-over coffee, should the ice be placed into the server in advance, or added only after brewing is complete? This question appears to concern only the order of operations, yet it may affect the cooling speed of the coffee liquid, the retention of aroma, and the final concentration. Front Street Coffee used a washed Geisha from Colombia's Finca La Divisa as a sample, and by controlling the coffee-to-water-to-ice ratio, grind size, water temperature, and brewing technique, conducted a comparative tasting of the two methods—"ice first" and "ice after"—while recording temperature and flavor changes at different time points. The experiment attempted to answer: does the order of adding ice truly produce a perceivable difference, or is it merely an illusion caused by the time gap? [more…]

2015 WBC Italian Champion Sasa Sestic returns to the competition stage after seven years. This time, he brings an experimental batch of Geisha from Iris Estate, a farm he created together with Jamison Savage, owner of Deborah Estate in Panama, to compete in the 2022 Australian Coffee Brewers Cup. This coffee professional, who has delved deeply into carbonic maceration for many years, chose to hold back in an era when anaerobic fermentation swept the competition scene, studying regional terroir and volatile compounds, and using his original Paragon brewing method and ice-stone aroma-locking technique to showcase the candy-like sweetness of an ultra-long macerated Green Tip Geisha. This article will provide a complete analysis of his brewing approach, staged pouring parameters, and flavor performance, with a recommendation from Front Street Coffee at the end. [more…]

Recently, KFC stores have gradually replaced the fructose syrup balls served with iced coffee with yellow sugar packets, a change that has sparked widespread discussion on social media since late May. Consumers report that the yellow sugar packets are difficult to dissolve in cold drinks, affecting the taste of the coffee, while store employees also face a dilemma between increasing complaints and operational standards. Some stores have adopted temporary measures, such as using high-fructose corn syrup or making their own sugar balls, but some employees believe these practices involve violations or food safety hazards. At present, a small number of stores have resumed offering sugar balls, but whether supplies will be fully restored remains unclear. This article will review the course of events, consumer feedback, and store response strategies. [more…]

Since its creation, Dirty coffee has been served as a cold drink, using the density difference between cold milk and hot espresso to create a distinctly layered texture. But many coffee enthusiasts have raised the question: can Dirty be made as a hot beverage? This article begins with Front Street Coffee's secret menu, traces the origins and core production of Dirty, and deeply analyzes the feasibility of hot Dirty. Through actual testing with a specially made ice ball to rapidly cool the espresso and heating the milk, an attempt is made to replicate the layered effect, and the flavor differences between the iced and hot versions are compared. The article also explores the limitations of hot Dirty in café service, answering for coffee enthusiasts why hot Dirty is difficult to become a regular option. [more…]

In the final days of 2025, Luckin employees were busy with year-end inventory checks when they unexpectedly received a notice to calibrate store equipment stock, requiring them to verify whether small base-ingredient scoops and ice cream scoops were complete. This move immediately sparked speculation: is the brand about to launch a new product that requires scooping ice cream balls on site? Veteran employees were also reminded of the cumbersome add-in tea drinks from the Little Deer Tea era. With timeliness and hourly cup volume assessments becoming increasingly stringent, complex new products will undoubtedly add pressure on stores. Workers generally resist it, but some optimistic people think it may just be a routine inventory check. [more…]

Want to easily make café-quality coffee desserts and drinks at home? This article uses a combination of text and images to document in detail the complete process for making two drinks: affogato and sparkling iced americano. Affogato pours hot espresso over ice cream, blending hot and cold, and is essentially more of a dessert; sparkling iced americano, by pairing sparkling water with espresso, delivers a refreshing taste experience. The whole article breaks things down step by step, from ingredient preparation to extraction and assembly, with clear explanations for every stage, so even coffee beginners can quickly get the hang of it. Following Front Street Coffee's demonstration, you'll find that making these two drinks is far simpler than you might imagine. [more…]

Cold brew tea has become increasingly popular in recent years. Not only does it release less caffeine, making it suitable for people sensitive to caffeine, but cold water steeping also reduces the extraction of tannic acid, giving the tea a sweeter, smoother taste without bitterness. However, the cold brewing time varies greatly depending on the form of the tea leaves—broken pieces, strips, and ball-shaped leaves each have their own requirements. Steeping too long can lead to over-extraction and a cloudy, bitter brew. This article provides a detailed guide to the suitable tea types for cold brewing, a time reference chart, the relationship between water temperature and steeping duration, and answers to common questions such as whether overnight tea is safe to drink, helping you easily make a delicious glass of cold brew iced black tea. [more…]

Luckin Coffee has once again demonstrated its astonishing speed in launching new products, rolling out six new items in a single day, four of which are city-exclusive, with only the "Slacking Off Coconut Latte" available nationwide. This new product, which adds 0-fat konjac crystal balls to the iced coconut base, has been criticized as old wine in new bottles, yet its catchy name and "slacking off" theme precisely strike a chord with office workers' emotions, sparking widespread discussion on social platforms. Netizens outside the designated cities have complained about being unable to try it, while Luckin's tactic of riding internet buzzwords to drive marketing once again confirms its dual prowess in product innovation and topic creation. Since 2020, Luckin's pace of new product launches has continued to accelerate. In the face of homogenized competition in coffee and tea beverages, whoever can precisely grasp young consumers will seize market opportunities. [more…]

When adding a milk ball to meet the minimum order for delivery, it seemed like an ordinary thing to do, but recently a consumer discovered something suspicious. To reach the minimum order amount, the customer spent 1.5 yuan at a coffee shop to buy a milk ball labeled "Nestlé." Upon receiving it, they tore off the delivery label and found that it was actually a milk ball with the McDonald's logo. This sparked many speculations: Did the merchant resell milk balls collected for free from McDonald's to customers? Some pointed out that there are suppliers in the market selling milk balls with brand logos, so it might not necessarily be from "freeloading." Moreover, sharp-eyed netizens noticed that the milk ball was neither Nestlé nor McDonald's, but a product from "Vitasoy." A tiny milk ball has brought up various topics about the supply of coffee industry accessories. [more…]

American coffee may seem simple, but many details determine the final taste. Based on Front Street's practical experience, this article first explains that a delicious Americano requires a suitable espresso base and proper concentration, then shares three "tricks" to enhance the texture: First, pay attention to the hardness of the dilution water, because water accounts for over 97% of black coffee, and soft water can bring out a more noticeable sweetness; Second, choose whether to keep or remove the crema on the surface of the espresso according to personal preference—removing it improves cleanliness and sweetness, while keeping it provides better body and aftertaste; Third, use ice cubes to directly catch the espresso and then shake to dilute, drawing on the concept of rapid freezing to preserve aroma and lower the temperature. In addition, the article also compares the differences between Italian coffee and American coffee, and recommends several Front Street espresso beans suitable for making non-bitter Americanos, including Strawberry Candy Blend, Commercial Blend, Huakui SOE, and Yirgacheffe Natural Red Cherry SOE. [more…]

Coffee has become a mainstream daily beverage, and instant and capsule coffee occupy an important place among derivative categories thanks to their convenience. Companies such as Nestlé have driven the popularity of capsule coffee machines, and capsule coffee has grown rapidly worldwide. But the disposable metal and plastic shells have created a huge amount of waste. In response to this pain point, Swiss retailer Migros launched a new capsule coffee system, Coffee B, in Zurich on September 6, replacing traditional capsules with brown coffee balls. The outer layer uses a colorless and tasteless algae-based film, which can be composted after use and fully degrades within a few weeks. The accompanying coffee machine will first go on sale in Switzerland and France, and enter Germany in 2023. Algae packaging has also appeared in recent years in scenarios such as edible water bags, offering a new idea for reducing plastic in coffee packaging. [more…]