A latte is one shot of espresso and about six ounces of steamed milk, finished with a thin layer of microfoam. That ratio is the whole drink. Get it right and the coffee tastes sweet and rounded rather than sharp, because the milk sugars soften the espresso instead of burying it.
This guide covers the ratio, how to steam milk so it pours smoothly, and three ways to make a genuinely good latte if you do not own an espresso machine. If you want the difference between this and its neighbours, we compare them in cappuccino vs latte and flat white vs latte.
The short answer: a latte in five steps
- Pull a double shot of espresso, about 36g in a warmed glass or mug.
- Pour cold milk into a jug, filled to just below the spout.
- Steam to 60C (140F), keeping the steam tip just under the surface for the first few seconds to draw in air.
- Swirl and tap the jug until the milk looks like wet paint with no visible bubbles.
- Pour from height, then drop in close to bring the foam through at the end.
The latte ratio, and why it matters
A latte sits between a flat white and a caffe latte in most cafes, and the only thing separating those drinks is how much milk goes in and how much foam sits on top. Work by volume and it is roughly one part espresso to three parts milk.
| Drink | Espresso | Steamed milk | Foam depth |
|---|---|---|---|
| Latte | 36g (double) | About 180ml | 5mm |
| Flat white | 36g (double) | About 120ml | 2mm |
| Cappuccino | 36g (double) | About 90ml | 20mm or more |
| Cortado | 36g (double) | About 60ml | Barely any |
If your latte tastes thin, you almost certainly have too much milk rather than weak coffee. Drop to a smaller glass before you change anything about the shot.
How to steam milk so it actually pours
Steaming is two jobs in sequence, and people usually run them together and end up with stiff bubbles. First you add air, then you heat and roll.
Adding air (the first four seconds)
Sit the steam tip just below the milk surface so you hear a steady hissing, like paper tearing quietly. That is air being drawn in. Four seconds is plenty for a latte. Any longer and you are making cappuccino foam.
Rolling (the rest)
Drop the jug slightly so the tip is fully submerged and off centre. The milk should spin like a whirlpool. Keep going until the jug is uncomfortably warm to hold, which lands you around 60C. Past 65C the milk loses sweetness and starts to smell cooked.
- Whole milk is easiest. The fat gives you a forgiving, glossy foam.
- Oat milk is the best plant option. Look for a barista version, which has added protein or stabiliser so it does not split.
- Start cold. Cold milk buys you more time to fix the texture before it overheats.
- Never re-steam. Milk that has already been heated will not form microfoam again.
A jug and a thermometer matter more than the machine here. If your setup has no steam wand at all, a handheld frother gets you most of the way, and we tested the options in our milk frother roundup.
Three ways to make a latte without an espresso machine
You need strong, concentrated coffee rather than espresso specifically. These all work, in descending order of how close they get. See everything we have on espresso drinks.
Moka pot
The closest match. A moka pot brews at around two bars of pressure, so you get a thick, syrupy coffee that holds up against milk. Use it at the same 36g dose you would pull as a double.
AeroPress, brewed short
Use your normal dose but only 60ml of water and a fine grind. You get a concentrate that is bright rather than syrupy, which suits lighter roasts.
Very strong French press or pour over
Double the coffee and halve the water against your usual ratio. It will not have crema, and the texture is thinner, but the drink is still good. Our coffee to water ratio guide has the numbers for each method.
For the milk in any of these, warm it in a saucepan to 60C and use a handheld frother or a jar with a tight lid: half fill, shake hard for thirty seconds, then microwave uncovered for twenty seconds to set the foam.
Iced lattes are a different ratio
Cold milk does not soften espresso the way steamed milk does, so an iced latte needs a stronger base or it tastes watery once the ice melts. Pull a double, fill the glass two thirds with ice, then top with cold milk to about 150ml rather than 180ml. We go further into cold drinks in how to make iced coffee and our iced latte method.
Common latte problems, and what causes them
| Problem | Most likely cause | Fix |
|---|---|---|
| Tastes bitter and flat | Milk over 65C | Pull the jug off at 60C |
| Big bubbles, no gloss | Air added for too long | Cut aeration to four seconds |
| Foam sits on top as a lump | Milk not swirled before pouring | Swirl until it looks like wet paint |
| Drink tastes weak | Too much milk for the shot | Use a smaller glass |
| Sour, thin espresso | Under-extracted shot | Grind finer or increase the dose |
Which milk behaves best, and which will fight you
Milk choice changes the technique more than any other variable. What you are steaming is protein and fat: protein builds the bubble walls, fat keeps them stable and gives the drink body. Anything low in both is hard work.
| Milk | Foam quality | Temperature margin | Notes |
|---|---|---|---|
| Whole dairy | Excellent | Wide | The most forgiving. Start here. |
| Semi-skimmed | Good, drier | Narrower | Foams fast but collapses faster |
| Skimmed | Stiff, big bubbles | Narrow | Lots of foam, no body |
| Barista oat | Very good | Wide | Best plant option, added protein |
| Standard oat | Poor | Very narrow | Tends to split at 60C |
| Soy | Good | Narrow | Can curdle against acidic espresso |
| Almond | Poor | Very narrow | Thin, separates readily |
If a plant milk splits, it is usually heat rather than the espresso. Pull it off five degrees earlier, around 55C, and pour immediately.
What you actually need, at three budgets
Nothing extra
A saucepan and a jar with a lid. Heat the milk, half fill the jar, shake for thirty seconds, microwave uncovered for twenty. You get real foam, coarser than microfoam but perfectly drinkable.
Around the price of a few coffees out
A handheld frother and a 350ml jug. This is the biggest jump in the list, because a jug with a proper spout is what makes a controlled pour possible at all. We compare the frothers in our frother roundup.
A machine with a steam wand
Now you can build genuine microfoam and the ceiling rises a long way. Add a thermometer until you can judge 60C by touch, which takes about a week of daily practice. Machine options are in our espresso machine guide.
Flavoured lattes, without ruining the balance
Syrup goes in the cup first, before the espresso, so the shot dissolves it on the way through. Added last it sits at the bottom and the first half of the drink tastes of nothing. One 10ml pump is plenty for a 240ml latte; two makes it a dessert.
For the specific builds, we have the vanilla latte, pumpkin spice and iced chai, and if you want the cold-foam top instead of a syrup, see how to make cold foam.
The bottom line
A latte is a ratio problem before it is a skill problem. Two thirds of the fix is using a smaller glass and pulling the milk at 60C. Steaming technique matters, but it is the part that improves on its own once you stop overheating the milk. If you are building a setup from scratch, start with making espresso at home and work up to the milk.
Frequently Asked Questions About Making a Latte at Home
Yes, as long as you brew it much stronger than you would to drink black. Double the coffee and halve the water, so roughly 20g of coffee to 60ml of water. Regular strength drip coffee will taste watery once you add 180ml of milk.
Brew a concentrate in a moka pot, AeroPress or French press, then heat milk to 60C and froth it with a handheld frother or by shaking it in a sealed jar. A moka pot gets closest to espresso because it brews under pressure.
About one part espresso to three parts milk, which is a 36g double shot to roughly 180ml of steamed milk. Less milk gives you a flat white, more foam gives you a cappuccino.
60C, or 140F. That is the point where lactose tastes sweetest. Above 65C the milk proteins begin to break down, the sweetness disappears and you get a cooked smell that no amount of good espresso will hide.
Essentially yes, but the texture of the milk is what separates a latte from coffee with hot milk in it. Steaming folds tiny air bubbles into the milk to create microfoam, which gives the drink its weight and its sweetness.
Whole dairy milk is the most forgiving because the fat stabilises the foam. For plant milks, a barista-formulated oat milk performs best, since standard versions tend to split or refuse to hold foam at latte temperatures.
Megan Cunningham
Contributor
Tests everything in an ordinary kitchen on affordable gear.