Why Does Coffee Aroma Fade in an Iced Flat White?

A flat white is built on espresso with milk in a supporting role, so the coffee flavor reads stronger than in a latte. Most cafes serve it hot because the drink depends on thin, velvety microfoam poured over a double ristretto in a small cup. Add ice and the foam collapses, the texture thins out, and the coffee-to-milk balance shifts.

Preparation varies. The New Zealand approach uses a smaller cup, roughly 150 ml, with a fixed double espresso base, so less milk and a higher coffee ratio. Because espresso carries notes like whiskey, cream, vanilla, or berry acidity, the coffee aroma stays prominent. Dirty coffee is the iced alternative some cafes offer.

Flat white is a type of milk coffee favored by many coffee lovers. It centers on espresso, with milk serving only as a supporting role, and its coffee flavor is more intense than a latte. But have you noticed that Flat white is only served hot in most cafés, never iced? This is closely tied to its brewing philosophy—thin milk foam, a small cup size, and a double ristretto, pursuing a sip where you can feel both the velvety foam and the rich coffee liquid at once. This article will comprehensively unpack the correct way to enjoy this cup of "flat white" from the perspectives of its differences from a latte, the New Zealand and Australian schools of preparation, the actual output parameters at Front Street Coffee stores, and why no ice is added—and along the way, we'll also talk about the Dirty coffee known as an "iced latte without ice."

Walking into a café and ordering a milk coffee, if you prefer a soft, smooth mouthfeel, many people will choose a latte; but if you want the coffee's own flavor to stand out more, baristas will often recommend a Flat white. The Flat white produced at Front Street Coffee stores has notes of whiskey, cream, and vanilla, along with a berry-like sweet-and-sour quality, and its coffee aroma is quite full.

What exactly is the difference between a Flat white and a latte?

Both are made from only milk and espresso, but there are clear differences in their brewing approach and tasting experience.

Latte (Caffe Latte) literally means milk in Italian. It pursues a balance between coffee and milk—you can taste the coffee and also feel the milk's sweet richness, with the two complementing each other and neither overpowering the other. Flat white is different: it uses added milk to amplify the coffee's flavor. Coffee is the protagonist, and milk only plays a supporting role. So in terms of taste, Flat white has a stronger coffee character and is more intense.

Although Flat white has its own personality, there is no unified, fixed preparation ratio in the industry. Based on their own understanding, combined with the espresso beans used in their stores, baristas at different cafés produce Flat whites with different styles.

The New Zealand barista approach is: present it in a smaller cup than a latte (about 150ml), with a fixed base of a double espresso. A smaller cup size means less milk, a higher proportion of coffee, and naturally a stronger taste. Therefore, Flat white is also often called a "small latte."

As extraction techniques continue to improve, in order to more fully showcase the aroma of the coffee beans in an Australian white, some cafés in Melbourne will even switch the base to a double Ristretto, pouring milk foam of a thickness similar to a latte into a 150ml cup. Ristretto means extracting less liquid weight from the same dose of grounds. It can be understood as a reduced version of espresso, with flavor more concentrated in the early and middle stages of extraction and a more intense mouthfeel, which also places higher demands on coffee bean quality.

In Australia, however, baristas take the view that it is enough to keep the milk foam thinner than a latte. When making an Australian white, they use the same cup size as a latte, focusing on the difference in foam thickness. Compared with milk coffees such as lattes and cappuccinos, flat white has the thinnest milk foam, usually between 0.3 and 0.5cm. The "Flat" in Flat white means flat: the milk foam must be thin enough to be level with the rim of the cup and must not bulge above it, so that every sip of rich coffee liquid is wrapped in a layer of dense foam. That is why flat white is also called "flat white coffee." Latte milk foam mostly bulges about 0.5 to 0.7cm above the rim, while the foam of an Australian white must be kept below 0.5cm, otherwise it cannot form a "flat" surface. Front Street wants guests to drink a flat white that is creamy and smooth without being too "watery," so it retains a 0.3cm layer of milk foam.

What is Front Street's Flat white like?

So every café will, based on its own preferences and skill level, combined with the characteristics of the coffee beans it uses and its understanding of Flat white, create its own unique style. When producing a Flat white, Front Street retains the three major characteristics of a small cup size, thin milk foam, and a double ristretto espresso.

For Americano, Front Street's blend bean series is the first choice. They all use medium-dark roasting, with a balanced mouthfeel and rich, mellow flavor. They include the buttery Front Street Classic Blend, the nutty Front Street Specialty Blend, the caramel-flavored Front Street Commercial Blend, and the chocolate-flavored Front Street Dark Cocoa.

For the coffee base, Front Street uses a double ristretto: 20 grams of coffee grounds extracted into 30 grams of coffee liquid, with an extraction time of 25 to 27 seconds. But Front Street needs to remind you that the extraction parameters for each coffee bean will differ slightly. This plan is adjusted daily by baristas based on the Front Street Classic Blend coffee bean series.

Pour the extracted coffee liquid into a pre-prepared cup with a capacity of about 200ml, then pour 150ml of milk into a milk pitcher and steam it. When steaming the milk, incorporate less air than for a latte, so the foam layer is thinner and denser, and the temperature is best controlled at 55 to 60 degrees Celsius, making it more comfortable to drink. Finally, evenly integrate the steamed milk into the coffee liquid; latte art is optional. Front Street's Flat White presents the taste of chocolate milk and whiskey-filled chocolate, with a smooth, fragrant, and mellow entry and a very long finish.

Can Flat white be made iced?

When we drink a latte, we can usually choose it iced or hot, but Flat white is only served hot. The reason is that baristas hope that when you drink an Australian white, every sip lets you feel the perfect blend of milk foam and the milk coffee beneath it—only when the foam is dense enough, relatively thin, and at a pleasant temperature can you taste both the foam and the rich coffee liquid in every sip, and quickly finish it before the foam separates. Once ice cubes are added, the cooled milk coffee will be diluted, and the above effect becomes difficult to achieve.

If you are after a rich milk coffee with an iced feel, Front Street suggests you try an iced latte, or the "Dirty" coffee that has also been popular in the past two years. Dirty can be simply understood as an iced latte without ice. When making it, let espresso slowly flow onto the surface of chilled fresh milk. The Espresso gradually seeps downward between the milk surface and the glass wall, and the pure white fresh milk seems to be "dirtied," creating a "dirty" visual effect. The alternating hot-and-cold mouthfeel is very special.

The above content is compiled by CoffeeHunters, a coffee news website.