Here is how to make lychee cold foam in a single line: it is a pale, delicately floral, sweet-and-fragrant cap of cold-frothed milk flavoured with lychee, whipped cold with no heat until it is thick enough to float in a glossy layer over cold brew, iced coffee, an iced tea or a boba drink. Combine a few tablespoons of cold milk (or a milk-and-cream mix) with a teaspoon or two of lychee syrup or a little strained lychee juice, froth or shake until it thickens to a pourable foam, then pour it slowly over ice so it settles on top. The rest of this guide fills in the amounts, the texture dials and the keep-it-cold rules.
What lychee cold foam is
Lychee cold foam is a fruit-flavoured member of the cold foam family. If you want the full definition and the reason cold milk froths into a pourable cloud, that lives in our guides on what cold foam is and how to make cold foam; this page assumes the basics and focuses on the lychee version. In short, cold foam is milk aerated cold until it holds soft, glossy bubbles you can pour.
It helps to place it against two things it is not. Hot milk foam, the microfoam on a latte or cappuccino, is steamed: heat and steam pressure stretch the milk into a warm, dense froth that merges into the drink. Cold foam is made without any heat, so it stays airier and, crucially, pourable, which is why it sits as a distinct layer on an iced drink instead of blending in. Whipped cream is different again: it is cream beaten until stiff and holds its shape like a dollop, while cold foam is lighter, looser and meant to flow across the surface and slowly sink into the drink as you sip. Lychee cold foam takes that cold, pourable base and perfumes it with lychee, so you get a soft lychee cream cold foam rather than a stiff one.
A quick note on lychee
The lychee is a small, round fruit with a bumpy pink-red shell and translucent white flesh, native to East Asia and now grown widely across the tropics. Peel it and you get a fragrant, sweet, juicy pearl with a perfume many people describe as rosewater-like or floral. That aroma is exactly what makes lychee such a natural fit for a foam: a light dairy cap carries the scent beautifully and releases it as you drink. Lychee is hugely popular in the boba and iced-tea scene, where it turns up in slushes, fruit teas and jellies, so a lychee foam boba drink feels right at home for anyone who already loves the fruit.
The key point: you froth it cold
The one rule that matters most is that everything stays cold. No warming, no steaming. Cold milk (and a touch of cream, if you use it) whips into a stable foam because the fat and protein set up better at fridge temperature. Three tools all work:
- Handheld milk frother: the fastest route. Whisk the cold milk and lychee flavour in a tall, narrow cup for 20 to 40 seconds until it thickens and mounds.
- Jar and shake: no gadget needed. Add everything to a jar with a tight lid, fill it no more than a third full, and shake hard for 30 to 60 seconds until the foam roughly doubles.
- Small blender: a personal blender or the small cup of an immersion blender pulses the mix into foam in a few seconds.
Flavour it with lychee syrup for the cleanest, most repeatable result, or with a little strained lychee juice for a fresher taste. The easiest source of that juice is a can of lychees in syrup: spoon out a little of the syrup, or blend a lychee or two and strain it. Fresh lychees work too once peeled, pitted and pressed. Because fruit juice is thinner than syrup, a little cream or a higher-protein milk helps the foam hold.
Ingredients and amounts
This makes enough to cap one tall iced drink. Scale it up for more.
- 3 to 4 tablespoons (about 45 to 60 ml) cold milk, or a mix of milk plus 1 tablespoon cold cream for a thicker cap
- 1 to 2 teaspoons lychee syrup, or 1 to 2 teaspoons strained lychee juice (from canned lychees in syrup, or fresh)
- Optional: a drop of vanilla, or a small squeeze of lime to brighten the fruit
- Optional: a pinch of sugar if you are using unsweetened juice and want it sweeter
How to make lychee cold foam, step by step
- Chill everything. Use milk straight from the fridge and, if you can, a cold cup or jar. Cold is what makes the foam hold.
- Combine the base. Add the cold milk (or milk-and-cream mix) and the lychee syrup or strained lychee juice to a tall cup or a jar. Add the optional vanilla or lime now.
- Froth or shake until it thickens. Frother: whisk 20 to 40 seconds. Jar: shake 30 to 60 seconds. Blender: pulse a few seconds. Stop when the mix mounds softly and pours in a thick ribbon rather than a thin stream.
- Build the drink first. Fill a glass with ice and your coffee, tea or boba so the foam has something to sit on.
- Pour slowly over the back of a spoon. Ease the foam on so it settles into a glossy layer on top instead of sinking. Serve straight away, while it is cold and lofty.
The canned-lychee shortcut and dialling the thickness
Canned lychees in syrup are the easy shortcut here, and they are worth knowing about. The syrup they sit in is already sweet and lychee-scented, so a spoonful of it can do the whole flavouring job with no extra sugar. If you want more fruit character, blend one or two of the lychees into that syrup, then push it through a fine sieve so only smooth juice-syrup goes into the foam; the flesh has a little fibre that can leave the cap grainy or clog a frother.
Thickness is mostly about fat and protein. More cream makes a thicker, longer-lasting cap. A higher-protein milk holds better than a thin one. Among dairy-free options, oat milk (especially a barista blend) foams well and holds a soft cap; soy is high in protein and also stable. Here is a quick guide:
| Milk choice | Foam texture | Notes |
|---|---|---|
| Whole milk | Rich, medium-thick | Reliable all-rounder |
| Whole milk plus a splash of cream | Thickest, most stable | Best for a spoonable, long-lasting cap |
| Semi-skimmed / 2% | Lighter, looser | Foams fine, deflates a little faster |
| Skim | Thin, airy | Least stable; add a little cream to firm it up |
| Oat milk (barista) | Soft, holds well | Best dairy-free pick for a steady cap |
| Soy milk (barista) | Firm, stable | High protein helps it hold |
| Almond or coconut | Loose, delicate | Use a barista blend; may need a touch more to hold |
Serving it: iced coffee, iced tea and lychee foam boba
Lychee cold foam is at home on almost any cold drink. On cold brew or iced coffee, the floral fruit lifts the roast the way other fruit foams do - the same idea behind a strawberry cold foam, just with lychee's rosewater-like perfume in place of berries, and a close tropical cousin of mango cold foam. Where lychee really shines, though, is on tea. Float it over a glass of unsweetened iced black, green or jasmine tea and let it melt down as you drink. And because lychee is such a boba favourite, spooning it over a lychee or oolong milk tea with tapioca pearls makes a lovely lychee foam boba: the perfumed cap, the tea and the chewy pearls all play together. Because lychee syrup is already sweet, you often need less added sugar in the drink underneath, so taste before you sweeten.
Make-ahead and keeping it cold
Cold foam is best fresh, within a minute or two of frothing, because it slowly deflates as it warms. You can froth it a little ahead and keep it covered in the fridge for a short while, then give it a quick re-whisk before pouring, but it will never be quite as lofty as the first pour. This lychee cold foam recipe scales up cleanly, so make a slightly bigger batch if you are topping several glasses.
One safety note, kept practical and non-medical: fresh dairy and fresh fruit are both perishable. Keep the milk, cream and any lychee juice cold, do not leave a frothed drink sitting out in a warm room, and refrigerate leftover lychee syrup or juice in a clean, covered container. Use it promptly, and when in doubt, throw it out. Responses to any food vary from person to person; this is general food-handling guidance, not medical advice.