How to Make Cold Foam at Home (Including Without a Frother)

Cold foam is milk aerated cold, so it floats on an iced coffee instead of dissolving into it. No steam, no heat. You can make it with a handheld frother, a jar, a blender or a cream whipper — and the method you pick decides how long it survives before it melts into the drink.

What cold foam actually is

Steamed milk froths because heat unravels the proteins, which then wrap around air bubbles and hold them there. You can’t do that in a cold drink — pour hot foam onto iced coffee and it collapses and warms the drink at the same time.

Cold foam gets to the same place mechanically. You beat air into cold milk fast enough that the proteins trap it anyway. The result is denser and glossier than hot microfoam, and it sits as a distinct layer on top of the coffee rather than blending in. That layer is the whole point — you drink through it.

Which milk to use

This surprises people: skim milk foams best cold. Foam is built by protein, and fat actively gets in the way of cold aeration by breaking up the bubble walls. Skim has the same protein and none of the interference.

The catch is that skim-only foam tastes thin. What most cafes actually pour is a blend — mostly skim or full cream milk with a splash of cream for body. That’s what “sweet cream cold foam” means: milk, a little cream, and a sweetener.

Milk	Foam quality	Taste
Skim	Best volume, stiffest	Thin, a bit chalky on its own
Full cream	Good, softer	Rounder
Skim + splash of cream	Very good	The one to use
Oat (barista)	Good — barista blends are formulated for it	Sweet, works well
Almond	Weak, drops fast	Thin
Soy (barista)	Decent	Fine

Everything needs to be properly cold. Fridge cold, not bench cold.

The base recipe

Enough for two drinks.

• 120ml cold skim or full cream milk
• 40ml thickened or pure cream
• 1–2 tsp vanilla syrup, or sugar to taste

Combine, aerate by whichever method below, spoon over iced coffee or cold brew. Don’t stir.

Four ways to make it

Handheld milk frother

The default. Use a tall narrow container so the whisk stays submerged, and keep it just under the surface — that’s where it pulls air in. Thirty to forty-five seconds. Foam holds about five minutes.

A jar, with no equipment at all

Fill a jar no more than a third full, screw the lid on tight, and shake hard for about a minute. It genuinely works. The foam is coarser and starts breaking down within two or three minutes, so make it last.

Blender or stick blender

Fifteen to twenty seconds on high, no longer. Good for making several drinks at once. Over-blending warms the milk through friction and you lose the foam, so watch it.

Cream whipper

This is the version that holds. Pour the mix into a 500ml whipper — no more than the fill line — charge with one N₂O charger, shake ten times, and dispense. The nitrous dissolves into the mix under pressure and expands into very fine bubbles on the way out, which is why the texture is closer to a cafe’s than anything you’ll get from a frother.

Two practical advantages. The foam holds its structure for fifteen to twenty minutes in the glass instead of five. And the whipper lives in the fridge fully charged, so the second and third coffee of the day take about four seconds each — which is the real reason cafes use them.

One thing to know: this method wants some fat in the mix. Nitrous oxide dissolves into fat, so a pure skim mix will foam poorly in a whipper even though it’s the best milk for a frother. Keep the splash of cream in.

Flavoured cold foam

Same base, one addition. Add flavourings before aerating, not after.

Vanilla sweet cream

The base recipe above with 2 tsp vanilla syrup. This is the one most people mean when they say cold foam.

Matcha

Whisk 1 tsp matcha into a tablespoon of warm water first and let it cool. Adding dry powder straight to cold milk gives you lumps that never disperse.

Strawberry

Two tablespoons of strawberry puree, sieved. Skip the seeds — they clog a whipper nozzle and they sink through a frothed foam.

Salted caramel

A tablespoon of caramel sauce and a good pinch of salt. Warm the caramel slightly so it dissolves, then chill the mix again before aerating.

Coconut

Swap the cream for the thick solids from a chilled tin of coconut cream. Dairy-free and it holds surprisingly well.

What to put it on

Cold brew is the classic pairing — the foam softens the edge without diluting it the way milk does. It also works on iced long black, iced matcha, cold chocolate and iced chai.

Fill the glass to about three-quarters and leave room. The foam layer wants two to three centimetres, and a full glass means it runs down the side instead of sitting on top.

When it goes wrong

It won’t foam. The milk is too warm, or it’s a non-barista plant milk. Both are fixable — chill it properly, or switch to a barista blend.

It sinks straight into the coffee. Under-aerated. Cold foam should be thick enough to hold a spoon mark for a second or two. Keep going.

It splits or looks grainy. Too much fat, or over-worked. Cut the cream back and stop earlier.

It collapses in a couple of minutes. Normal for a jar or frother. If you want it to last, that’s what the whipper solves.

Common questions

What is cold foam made of?

Cold milk, usually with a little cream and a sweetener, aerated without heat. The sweet cream version is milk, cream and vanilla syrup.

How do you make cold foam without a frother?

Shake it in a jar filled no more than a third full, for about a minute. A blender for fifteen seconds also works, as does a cream whipper, which gives the best result of the three.

Why is my cold foam not thickening?

Usually the milk isn’t cold enough. After that, check what you’re using — almond milk and non-barista plant milks don’t have the protein to hold air.

Is cold foam just whipped cream?

No. Whipped cream is cream alone, whipped until the fat holds air, and it’s thick enough to hold a peak. Cold foam is mostly milk, much lighter, and pourable.

How long does cold foam last?

A few minutes from a jar, around five from a handheld frother, fifteen to twenty from a charged whipper. Make it last and drink it while it’s there.