For coffee lovers, spilling liquid coffee and staining clothes has always been a minor but persistent annoyance. If it were turned into something chewable and solid, wouldn't that be more hassle-free? Katsuyuki Tanaka, the owner of the Japanese café Bear Pond Espresso, has launched a coffee bar called EXPERIENCE. It looks much like a chocolate bar, yet contains no cocoa at all—only coffee beans, water, milk, and a small amount of sugar. Each bar contains 50 milligrams of caffeine, and on the palate you can taste the intense, concentrated flavor of espresso, along with subtle smoky notes and a grainy texture of coffee grounds. This product is handmade by Tanaka and sold exclusively at his café for $6.25, offering a new way to consume coffee as food. [more…]

Dirty coffee has become a staple in specialty cafes thanks to its high aesthetic appeal and unique taste, yet there has always been debate over whether an ice-cold cup is essential during preparation. Through side-by-side testing of glass cups at room temperature, refrigerated, and frozen, Front Street found that milk quality is the key to layering, while cup temperature mainly affects the chilled mouthfeel and the preservation of crema. The article also traces the practice of Dirty's originator, Katsuyuki Tanaka, who did not pre-chill his cup. If you're after photogenic presentation and a layered experience, Front Street recommends chilling the cup together with the milk and paying attention to the optimal tasting window. [more…]

For those who love milk coffee, Dirty is certainly no stranger. Although Front Street Coffee hasn't listed "Dirty" on its menu, many in-the-know friends will actively order this drink after entering the shop. After all, it has long been popular nationwide and has even become a signature item for many coffee shops. Facing the first sip, [more…]

Dirty coffee is an Italian-style beverage born from the collision of espresso and cold milk. With its slowly sinking crema layer and the alternating hot-and-cold drinking experience, it quickly rose to fame in specialty coffee shops. Starting from Front Street Coffee's brewing parameters, this article traces the origins of Dirty, including Katsuyuki Tanaka's B.P Dirty in Japan and the early practices of "layered coffee" in China, and analyzes why this small-cup coffee became a viral product: it fills the visual gap of iced coffee while offering a layered progression from hot to cold and from bitter to sweet. [more…]

Dirty coffee has risen rapidly in the specialty coffee scene in recent years, becoming a popular staple in many cafés. This drink, made of milk and espresso, has won over countless coffee lovers with its distinctive visual layers and the contrast of hot and cold in every sip. But do you know which country Dirty coffee was first created in? Why do baristas always remind you to take big sips and finish it as quickly as possible? In this article, Front Street Coffee takes you back through the story of how dirty coffee was invented, traces its evolution from a hidden menu item to a permanent offering, and takes a deep dive into the proper way to taste it, so you can truly appreciate the charm of this layered milk coffee. [more…]

Since Dirty coffee rose to popularity in China around 2018, it has not faded away like other trendy drinks. Instead, it has firmly secured a permanent spot on the menus of major specialty coffee shops, standing on equal footing with the latte. There are over 200,000 related posts on Xiaohongshu, with each tag receiving more than 5 million views. This drink, originally created by Japanese barista Katsuyuki Tanaka, forms a layered effect by pouring hot espresso over cold milk. With its unique taste combining hot and cold and the enhancement of ice-distilled purified milk, it has driven the domestic coffee market to pursue higher ingredient quality. This article will analyze why Dirty coffee has become the "beloved darling" of local specialty coffee, from its origin and spread to its production characteristics and market impact. [more…]

It must be said that the ways to play with espresso are truly endlessly varied—just the combination of espresso and milk alone can create a great many coffee drinks. Dirty coffee is a very popular type of espresso drink born from the collision of espresso and milk. If you know a little about espresso-related knowledge, it is not hard to find that Di [more…]

The collision of espresso and iced milk has given rise to the Dirty coffee that has swept boutique cafés in recent years. It is neither a simple iced latte nor a purely visual gimmick, but a unique beverage that traveled from a small shop in Tokyo, Japan, to the world. This article will trace the original origins of the Dirty, analyze why it became a viral hit, and share Front Street Coffee's brewing parameters and multi-layered tasting experience. Whether you want to learn about its history or plan to recreate it yourself, this article will give you the complete answer. [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…]

The combination of espresso and milk has always been a source of creativity in Italian coffee, and the Dirty, a dirty coffee, is one of the most popular examples. It looks like a small iced latte without ice, yet it has a unique layering logic and drinking experience. Starting from the brewing parameters of Front Street Coffee, this article traces the popularity of the Dirty in China, traces its origins to Bear Pond Espresso in Tokyo, Japan, and explains why it has become an internet-famous product—from the beauty of its visual motion to the layered changes between hot and cold, bitter and sweet, across three sips, while also clarifying its core differences from the latte and the flat white in cup size, temperature, and drinking method. [more…]

Walk into any coffee shop, and those familiar names on the menu—latte, cappuccino, flat white, americano—all actually stem from the same base: espresso. But have you ever wondered why these coffees are called what they are? And what origins do they each have? This article will take you through the birth stories of espresso, americano, cappuccino, latte, mocha, macchiato, caramel macchiato, flat white, and Dirty one by one, from Italian coffee houses to Australian coffee culture, and then to Japanese creative inspiration, to understand the historical threads behind each cup of coffee. After learning about these origins, perhaps you'll taste more the next time you savor them. [more…]

Coffee shop menus always offer a very rich selection of options. Just within the espresso coffee lineup alone, there are dozens of products with different names. Many friends may have already learned what kind of coffee they taste like through drinking them. But as for their origins, most people still don't know much about them! So, Front Street [more…]

Walk into any café and the espresso menu is dazzling—espresso, Americano, cappuccino, latte, mocha, macchiato, flat white, dirty coffee… Each has its own distinct flavor, and each has its own story behind it. Many people have drunk them but may not necessarily understand how they came to be, how they were named, or how they should be made. This article, from the perspective of Front Street Coffee, sorts through the origins and recipes of these common espresso drinks one by one, to help you better appreciate the finer points of each cup as you drink. [more…]

Many people, upon first seeing a Dirty and an iced latte, feel that these two drinks are almost identical—both are espresso with milk, and both can present beautiful layers. But upon deeper understanding, you'll find that they walk completely different paths, from their founding concepts to production details, and then to the drinking experience. The original intention of a latte is to dilute espresso with milk, making it more acceptable to more people; Dirty does the opposite, hoping that the espresso maintains its independent character and forms a sharp contrast with the milk. In this article, Front Street Coffee will dissect the fundamental differences between these two drinks one by one from four dimensions: historical origins, production parameters, appearance, and tasting experience, helping you distinguish their respective characteristics. [more…]

What is the most expensive coffee you've ever had? In Yao City, Osaka, there's a self-roasting shop called "The Münch," selling the most expensive coffee in all of Japan—the "Phantom Creation" low-temperature, long-term aged coffee. This coffee is made from aged beans stored for 15-30 years, deeply roasted, brewed with a flannel drip to create a 1:1 super-concentrated extract, then placed into special coffee wooden barrels and aged in a -3°C cold storage for 20-30 years. By that calculation, even the youngest coffee in the barrel has gone through 35 springs and autumns. 40ml sells for 100,000 yen, with a tasting price of 2,000 yen. What exactly does it taste like? And what kind of persistent shop owner stands behind it? Let's step together into Mr. Tanaka's world of coffee. [more…]

Walk into any coffee shop, and the espresso menu often lists dozens of options. We may have already had a latte, a cappuccino, or a Dirty, yet may not know where they came from, why they were named that way, or how to make them correctly. From the perspective of Front Street, this article sorts out the background of espresso's birth and the logic behind its naming, focusing on restoring the origin of Espresso and the creative story of Dirty coffee, along with specific operational points, to help coffee lovers gain a deeper understanding of the ingenuity and fun behind every cup when they drink it. [more…]