Does Flat White Have Sugar? How Many Espresso Shots Are in Luckin Flat White?

The Flat White — known as "Flat White" at Starbucks and "AusWhite" at Luckin Coffee — is traditionally served unsweetened. Its whole appeal lies in letting the intensity of the coffee and the silkiness of the milk take center stage, which is exactly why it has become such a popular milk-based espresso drink.

A Thinner Milk Foam Than a Latte

Anyone who has ordered a Flat White at FrontStreet Coffee will notice three things: the cup is smaller than a latte, the coffee flavor hits harder, and the foam is thinner. That is no accident — the Flat White is, in essence, a child of the latte.

When Italians carried espresso to Australia and New Zealand last century, locals found the thick, pillowy foam of cappuccinos and lattes too much. So they began steaming milk with less air, producing a microfoam so fine that the surface settled perfectly flat, level with the rim of the cup — hence the name: "flat" for the level surface, "white" for the milk coffee.

A typical latte carries about 0.5 cm of foam, which domes slightly and gives room for latte art. A Flat White keeps its foam to 0.3 cm or less — any thicker and the surface simply won't stay flat. Practices vary from shop to shop; some baristas skip texturing altogether and simply heat the milk so customers taste more of the crema. At FrontStreet Coffee, we aim for a Flat White that is creamy and smooth without ever feeling watery, so we hold that 0.3 cm foam layer.

Less Milk in the Cup

Every cafe sets its own coffee-to-milk ratio, but Flat Whites generally scale the milk down to match the smaller cup. In New Zealand, baristas often use 150 ml cups, cutting the milk and concentrating the coffee flavor accordingly.

FrontStreet Coffee serves its Flat White in a 200 ml ceramic cup built on a double Ristretto with 150 ml of fresh milk. The milk is aerated even less than for a latte, yielding a thin, dense foam, and is steamed to 55–60°C for the best texture. The espresso base is our own house blend — which raises an obvious question: what exactly is a Ristretto?

Less Liquid: The Ristretto Base

Ristretto means "restricted" or "short" in Italian, and it is essentially a restricted version of espresso: the shot is cut short, keeping only the front and middle portions of the extraction. The result is a smaller, more concentrated liquid with a bolder flavor.

Most of FrontStreet Coffee's espresso drinks use a standard Espresso base, so our baristas dial in an extraction plan every morning before opening, adjusted daily for the beans on the bar. For our house espresso, that means 20 g of grounds yielding 40 g of liquid in 28–30 seconds. For a Ristretto, with grind and dose unchanged, the same 20 g dose yields only 27 g of liquid in 20–25 seconds. Because the shot stops early, the Ristretto is more concentrated than an Espresso, with less caffeine but more intense berry acidity, winey notes, and caramel sweetness.

A Bolder, Richer Cup

Ultimately, the Flat White exists because coffee people kept chasing better flavor and mouthfeel in milk coffee, and every cafe interprets it differently — smaller servings, thinner foam, a more concentrated base. Those are the threads that run through them all.

FrontStreet Coffee pulls its espresso from our own roasted "Sunflower Sunny Blend," a combination of 70% Honduras Sherry and 30% Yirgacheffe Natural Red Cherry. The whiskey, vanilla, and cream of the Sherry component meet the tropical fruit and fermented notes of the Red Cherry, producing a richly aromatic cup with a smooth body. The finished Flat White shows vanilla, chocolate milk, whiskey-laced chocolate, and berry sweetness with a mellow, full entry and a remarkably long finish.

FrontStreet Coffee Recommendation

If this article has you thinking about making milk coffees at home, FrontStreet's Classic Blend is a great starting point. This medium-dark espresso blend of three origins — inspired by the old-school Mandheling-Brazil pairing, with a touch of Robusta for extra crema — pours with pronounced butter, toast, and caramel-biscuit aromas, a solid body, fine crema, and very stable extraction.

Prefer a nutty, chocolatey profile? The FrontStreet Premium Blend pairs washed Colombian with pulped-natural Brazilian beans, showing nuts, dark chocolate, and caramel as espresso, and creamy almond and cocoa notes in lattes and Flat Whites — crema on par with cafe quality and more than enough for practicing latte art. For those planning to open a shop, the FrontStreet Commercial Blend adds a little Robusta to the Premium formula for darker, denser crema and extra body.