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…]

These days, walking into any beverage shop, the variety on the menu is always dazzling. Boba shops are selling porridge, cafes surprisingly offer lemon tea, and industry competition has long entered a white-hot stage. More noteworthy is that the boundary between coffee and milk tea is being continuously broken: oats, fermented rice, thick milk, and osmanthus are all being added to coffee, the traditional bitter taste is weakened, and the flavor is moving closer to milk tea. A science blogger on Weibo once organized a blind test, asking participants to distinguish between coffee and milk tea with similar flavors, and surprisingly nearly half of the people could not accurately tell them apart. Coffee's localization and youth-oriented strategies, the migration of childhood milk tea memories, and various novelty pairings have jointly driven this trend. This article takes you to explore the phenomenon of coffee becoming more like milk tea and the logic behind it. [more…]

At this year's World Brewers Cup, blend beans became a favorite among many competitors, but traditional blends often require repeated debugging, which is time-consuming and labor-intensive. A Finnish roastery named Kaffa took a different approach, partnering with an AI company called Elev. After inputting flavor information for all the coffee beans in the roastery into a model similar to ChatGPT, they had the AI directly design a blend formula aimed at mass-market tastes. Surprisingly, the formula the AI provided differed considerably from the usual thinking of baristas, yet it won unanimous approval in blind tastings and even thoughtfully generated a packaging label. The integration of AI into the coffee industry is nothing new, but this time, can the blending answer it delivered shake the professional status of baristas? This article takes you through this interesting experiment, along with related observations from Front Street Coffee. [more…]

What exactly is the coffee bean grading system based on? Does bean size directly determine flavor intensity? To answer these questions, Front Street Coffee specially selected Costa Rican Mozart beans for a cupping comparison experiment, sorting the same batch of beans into large, medium, and small sizes, then taking the largest and smallest two beans for a blind extraction test. The results showed that the two did indeed differ slightly in flavor, but the direction was unexpected—the small beans actually had a more prominent flavor than the large beans. However, this difference mainly came from the degree of roasting deviation caused by different particle sizes, rather than the bean size itself. What truly determines coffee flavor is genetics, growing environment, processing method, and roasting degree. This article will combine experimental data with industry theory to systematically sort out the logic of coffee bean grading and the real factors affecting flavor. [more…]

Water is the largest component of black coffee and directly participates in and influences the extraction process, so differences in water quality often bring about completely different flavor expressions. There are many types of bottled water on the market, with prices ranging widely from high to low, and whether more expensive water is more suitable for brewing coffee has become a question for many brewing enthusiasts. This article uses two types of bottled water with明显 price differences as test subjects, and adds Nongfu Spring, commonly used in stores, as a control, conducting blind tasting comparisons with two coffees, Yirgacheffe Red Cherry and Diamond Mountain. At the same time, from the perspectives of acidity and alkalinity, softness and hardness, TDS, and calcium and magnesium ions, it explains the principles by which water quality affects extraction, helping coffee enthusiasts understand how to choose more suitable water for brewing coffee. [more…]

In espresso preparation, WDT needles are often used to break up clumps and stabilize extraction. But without professional tools, can a toothpick serve as a temporary substitute? Front Street Coffee took advantage of the humid weather of Guangzhou's returning south wind days and used the Warm Sun blend to conduct three sets of comparative extractions, observing the espresso performance with no WDT tool, with WDT needles, and after stirring with a toothpick, and further made iced americanos for a blind test. The results found that WDT needles can indeed make extraction more even, and toothpicks also have a certain effect under specific circumstances, but when paired with water or milk, the difference is not easily noticeable. This article will present the complete experimental process and conclusions, and explain the origin of WDT needles and the correct approach to using them. [more…]

Every year, global coffee production is enormous, and different regions and processing methods give coffee beans an endless variety of flavors. Rather than trying blindly, many enthusiasts choose to buy award-winning beans from competitions directly, which ensures quality and lets them experience the award-winning flavors. Coffee farmers also hope to achieve good rankings through competitions to increase the selling price and reputation of their green beans. However, a specialty coffee evaluation in Yunlin County, Taiwan, for self-produced beans was disrupted by a computer system failure that scrambled the codes linking entrants to coffee beans, causing errors in the previously announced rankings: a Grand Prize winner became a Gold Award winner, drawing attention. The organizers urgently corrected the list and promised to pay the bonus difference, but the credibility of the competition still faces a test. [more…]

Many coffee enthusiasts wonder when they see baristas using electronic scales in cafés: does making a cup of coffee really require such fuss? Couldn't you, like an experienced chef, just eyeball it or use a measuring spoon or cup and still brew good coffee? An electronic scale is indeed not an absolute necessity for making coffee, but eyeballing and measuring spoons have obvious inconsistencies. This article, based on actual tests at Front Street Coffee, first uses measuring spoons as an example to reveal that dark-roasted and light-roasted beans can differ by several grams in weight at the same volume, then explains the huge impact of dose deviation on concentration and flavor; next, using espresso as an example, it explains why cup markings cannot accurately reflect liquid weight. The article ultimately suggests that if you want consistent output or to study parameters, an electronic scale remains a trustworthy tool. [more…]

"How big of a difference can there be between coffee with a 30-second bloom and a 60-second bloom?" This was a question a friend asked Front Street Coffee yesterday. I have to say, this question is actually quite interesting! As we all know, blooming is a routine step in pour-over coffee. Specifically, before the official pour, we pre-pour [more…]

Adjusting the espresso recipe every morning is a required course for many baristas, but many people waste a large amount of beans through repeated trial and error, which is costly and can easily lead to heart palpitations from drinking too much. Front Street Coffee also went through this stage, and ultimately it was because they kept staring only at the grind setting and adjusting repeatedly, without finding the true source of the problem. This article sorts out from the beginning a method for determining the day's extraction formula within three shots: first determine whether the grind needs to be changed, then infer underextraction or overextraction from the taste, and finally master the two key details when adjusting the grinder—distinguishing the size of the adjustment increment and purging residual grounds. The article also includes practical tips such as preheating the blind basket, helping reduce waste and improve morning adjustment efficiency. [more…]

In an era where self-media tutorials are everywhere, beginners often blame their brewing technique when coffee doesn't taste good. But can technique really turn something mediocre into something magical? Starting from the dissolution patterns of flavor compounds, this article analyzes how the alternation of washing and soaking during pouring affects extraction efficiency, and uses the comparison between the three-pour method and the one-pour method as an example to reveal the source of differences in sweetness. At the same time, through blind tasting experiments, Front Street Coffee shows that what ultimately determines the ceiling of a cup of coffee is still the beans themselves. Technique can only add the finishing touch; choosing the right beans is the key. [more…]

While delivery platforms bring orders to coffee shops, they also carry the hidden risk of brand devaluation. Many shop owners have found that blindly joining price wars not only makes profitability difficult but can also erode the store's brand value. This article systematically sorts out the key aspects of coffee shop delivery operations, from pre-opening pricing planning, accumulating Dianping ratings, and delivery menu strategies, to how to convert platform traffic into private-domain customers. It also emphasizes that independent coffee shops should differentiate themselves from chain brands through professional quality and service details, rather than getting caught in low-price involution. The article also shares practical techniques such as stamp cards and scratch cards to guide delivery customers to offline visits, helping coffee shops effectively attract traffic through delivery while maintaining their brand tone. [more…]

Blooming is an almost indispensable step in pour-over coffee. Typically, we pour a small amount of hot water to wet the coffee bed, then wait for about 30 seconds. This seemingly simple pause—how much does it actually affect extraction? If we extend the time to 60 seconds, will the coffee taste better? Front Street conducted comparative brewing experiments with three coffee beans of different freshness levels, measuring the extraction yield difference between a 30-second and 60-second bloom, explained the mechanism of blooming from the perspective of carbon dioxide release, and offered blooming time recommendations suitable for beginners. [more…]

After Luckin Coffee launched its Huakui SOE, it quickly followed up with a Finca El Paraiso SOE, sparking interest among many coffee enthusiasts in this Colombian champion estate bean. Front Street Coffee's bean list happens to include the Finca El Paraiso Sakura series as well. Starting from the concept of SOE, this article will introduce Finca El Paraiso's estate background, cultivated varieties, and double anaerobic washed processing method, and share the pour-over parameters and flavor performance of Front Street's Sakura coffee bean. At the same time, we will also put it to the test by making espresso, americano, and latte with it, to see which type of Italian-style coffee this bean is actually suited for and whether it can take on the role of the same SOE used in Luckin's small black cup. [more…]

Can you drink coffee after contracting COVID-19? This has been the most frequently asked question in our inbox recently. Based on the personal experiences of many coffee lovers, the answer is not absolute—it depends on individual constitution and specific symptoms. When experiencing heart discomfort, fever, severe sore throat, or right after taking medication, you need to be especially cautious or even temporarily stop drinking coffee; whereas with mild to moderate headaches, a moderate amount of coffee may actually help relieve them. If you really want to drink coffee, pour-over is a relatively safe choice since the paper filter makes the coffee cleaner. There's no need to feel it's a waste if you temporarily lose your sense of taste or smell—drink it if you want to, as it might even help promote the recovery of your senses. Freshly roasted beans only have a peak flavor window of 30-40 days, so don't let good beans sit around until they expire. [more…]

The coffee world has its own world-class competitive stage—from barista championships to brewing, latte art, roasting, cupping, mixology, and Turkish coffee, the seven major competitions under the World Coffee Championships (WCC) each have their own highlights, testing competitors' comprehensive skills while continuously leading the trends in specialty coffee. Today, Front Street Coffee takes you through these international competitions one by one to understand their content and rules, and to see what exactly the world's top coffee professionals compete in and how they compete. [more…]

In the extraction parameters of espresso, pressure is often regarded as a variable that is not easy to adjust but has far-reaching effects. This time, Front Street Coffee focuses on this "hidden key player"—extraction pressure. The article first clarifies the difference between extraction pressure and pump pressure, then through three comparison experiments at 6 bar, 9 bar, and 11 bar, demonstrates how pressure changes affect flow rate, time, and flavor performance. It then explains why 9 bar has become the factory default for coffee machines, and the burnt bitterness that may result from pressures above 10 bar. Finally, it briefly mentions the trend of variable pressure extraction, providing coffee enthusiasts with a clear reference for understanding pressure and parameter adjustment. [more…]

A latte may seem simple, but it is the drink that best tests the skill of pairing coffee beans with milk. Why does a latte taste different at every shop? The key often lies in three areas: the quality of the ingredients, the ratio of coffee to milk, and the operational details of extraction and integration. Drawing on Front Street's practical experience, this article first discusses how to choose an espresso blend and fresh milk suitable for making lattes, then explains the approximate range of the coffee-to-milk ratio, and finally breaks down step by step the key points of espresso extraction, milk frothing, and pouring techniques to help you make a latte with balanced flavor and a velvety mouthfeel. [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…]

Many coffee enthusiasts operating semi-automatic espresso machines at home will notice a detail: the first espresso extracted right after the machine is turned on is often poured straight down the drain. This is not waste, but an early-tuning routine followed by both professional coffee shops and experienced home baristas. Why exactly can't this espresso be drunk? What systematic preparatory work do coffee shops do before officially opening? What role does espresso cleaning powder play in this? This article will focus on the daily startup routine of espresso machines, explain why the first shot of espresso is discarded, and comprehensively lay out the standard steps for in-store morning tuning, while also explaining the uses of cleaning powder and recommendations for choosing it. The article will also draw on the practical experience of Front Street Coffee to help everyone develop a correct mindset for coffee machine maintenance. [more…]