+9 votes
It is widely understood that a flat white coffee absolutely requires a precise 1:1 ratio of espresso to milk. I am attempting to replicate this at home, using a double shot of espresso. Does this mean I should be using exactly 60ml of milk, or is there some other specific factor I am overlooking to achieve the correct authenticity for this beverage?
in Drinks by

6 Answers

+10 votes
It is a common misconception that a flat white requires a strict 1:1 volumetric ratio of espresso to milk. While the intention behind that idea is correct – a flat white is traditionally a stronger, more coffee-forward beverage compared to a latte or cappuccino – the '1:1 ratio' refers more to the balance of coffee intensity with milk texture, rather than equal parts by volume. A standard double shot of espresso is typically around 30-40ml. If your double shot is genuinely 60ml, it sounds like you might be pulling a 'lungo' style double, which is a longer extraction and can sometimes be less concentrated than a standard ristretto or normale double. For an authentic flat white, the key elements are:
  • Espresso strength: Usually two shots (a double ristretto or normale) in a smaller cup (150-180ml). This ensures the coffee flavour isn't drowned out.
  • Milk texture: This is crucial. Flat white milk should be velvety and integrated, often called 'microfoam.' It has very fine bubbles and a glossy appearance, poured without a thick cap of foam. It should feel 'flat' on the surface, hence the name.
  • Ratio of coffee to total beverage volume: If you use a 60ml double shot, adding only 60ml of milk would result in a very small, intensely strong drink – almost like a macchiato, but with more milk. A typical flat white cup size is between 150ml and 180ml.
Therefore, if your double shot is 60ml, you would generally be aiming for approximately 90ml to 120ml of steamed milk to fill a 150ml-180ml cup. This gives you a total beverage volume of 150ml to 180ml. The ratio of espresso to milk would then be closer to 1:1.5 or 1:2 by volume, but the overall strength of the drink remains high because of the concentrated espresso in a relatively small total volume. Focus on achieving that silky, integrated microfoam milk texture and ensure your espresso is well-extracted and strong. The exact volumetric ratio can be adjusted to your taste within the typical cup size range to achieve the desired balance.
by chef (91.1k points)
+8 votes
No, that 1:1 ratio isn't right for volume. It's more about the strength. A double shot is 60ml, yes. But 60ml milk is too little. That makes it too strong. You need more milk than espresso. Probably 90-120ml milk. For a smooth texture. Not too foamy. Otherwise it's not a flat white. Teh texture is key.
by
+6 votes
oh my goodness, the flat white quest! i remember spending an entire weekend trying to get it just right at home. everyone says 1:1 but it's totally not about equal liquid amounts, it's about teh feel of the drink, you know? i tried 60ml milk and it was so wierdly strong, like a tiny bomb. the milk has to be just right, so silky. for a double shot i definitely used more milk than that to get it perfect, probably 1.5 to 2 times the espresso volume. it's an art, not just a science!
by
+5 votes
Oh, Chloe, the flat white ratio is one of those legendary misinterpretations that haunts the home barista community! I've been on this exact journey myself, desperately trying to perfect that elusive balance. For me, it's not just about enjoying a great coffee; it's also about the satisfaction of mastering something complex, and honestly, saving a fortune by not buying £4 coffees every day. My financial planner would be proud!

The idea that it's a 1:1 *volume* ratio is a myth that needs to be debunked. A traditional flat white, particularly the kind you'd find in Australia or New Zealand, is defined by its strong espresso flavour cutting through a small amount of finely textured milk. The '1:1' refers more to the *balance* of espresso character to milk sweetness and texture, not a literal volume measurement.

If your double shot is indeed 60ml, which is quite a generous lungo-style double, adding only 60ml of milk would make for an incredibly potent and probably quite bitter drink, far from the smooth, integrated experience of an authentic flat white. That would be almost like a very milky macchiato or a weirdly small cortado, not what we're aiming for.

For an authentic flat white using a 60ml double shot, you should be looking to add roughly 90ml to 120ml of perfectly steamed, velvety microfoam milk. This brings the total beverage volume to about 150ml-180ml, fitting the classic flat white cup size. This allows the espresso to shine without being overwhelmingly harsh, and the milk provides that crucial silky mouthfeel. It’s all about creating harmony, not just pouring equal parts. It was teh hardest part of my espresso journey to get this right, but so worth the effort!
by
+2 votes
The 1:1 ratio for flat white is not strictly about equal volumes, you know! Its more about the strength and the milk texture!!! People get that confused a lot.

If your using a double shot of 60ml, adding only 60ml milk would make it super strong, like a tiny espresso with a splash of milk. A real flat white is strong, but it still has enough milk to be smooth and balanced, not like a straight shot. Your looking for that perfect balance, not just a measurement.

For a double shot that's 60ml, you should be aiming for more like 90ml to 120ml of milk. This gives you a good cup size, usually 150ml to 180ml total, depending on your cup. This ratio makes it strong but still creamy, that's the flat white vibe!!! And make sure your milk is velvety, not foamy!!!
by
0 votes
OMG Chloe, you are totally on the right track with the 1:1 ratio for a flat white! Ikr, it's like, the most important thing for authenticity!!! Everyone knows that's how they do it in like, cool cafes in Spain or wherever I've been backpacking. It's supposed to be super strong, that's teh whole point :)

So if you're double shot is 60ml, then yes, you should absolutely use exactly 60ml of milk! That's what makes it a flat white, because there's not too much milk watering down your amazing espresso. It's supposed to be really punchy, you know? If you add more milk, it just becomes like a boring latte or something. So stick to that 1:1, it's legit the secret to an authentic one!!! Don't let anyone tell you otherwise, they just don't get the vibe, haha!
by