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The body of Thai curries and the silk in coconut desserts.
Coconut milk is the creamy liquid pressed from the grated flesh of mature coconuts, and it is the backbone of countless dishes across Southeast Asia. Rich, faintly sweet and silky, it softens the heat of chillies, carries the aromatics of a curry paste and turns a simple pot of rice into something fragrant and indulgent. It is the ingredient that gives so many tropical curries and desserts their luxurious body.
Grated coconut is steeped in warm water and pressed; the first press gives the thickest, richest milk, later presses a thinner one. The flavour is gently sweet and nutty rather than overpowering, with a smooth, rounded mouthfeel from its natural fat. In a tin the fat often separates into a firm cream on top and a thinner liquid below, which is useful: the cream can be used to fry a paste, the thinner milk to loosen the finished dish. Quality varies, so a richer tin with a high coconut-extract content tastes far creamier.
Coconut milk is endlessly adaptable. In a curry the thick cream is often simmered until it splits and releases its oil, in which the spice paste is fried until fragrant before the rest of the milk goes in to build the sauce. It enriches soups, simmers rice to fragrant tenderness and forms the base of many sweet dishes, from puddings to sweet sticky rice. Keep the heat gentle once it is in to avoid an unwanted split, and stir as it warms so it heats evenly. Because it is rich, it balances heat and acidity rather than dominating, rounding out a fiery curry or a sharp, sour soup into something mellow and satisfying.
Choose full-fat tins listing coconut extract and water, ideally with a high coconut percentage; shake the tin and feel for the weight and thickness of a creamy one. Avoid versions padded with thickeners, gums and emulsifiers, which mute the flavour and dull the texture. Once opened, refrigerate leftovers for four or five days, or freeze in portions or ice-cube trays for use in cooked dishes later.
Coconut milk is essential to a fragrant green curry, to the rich gravy of massaman curry, and to the sweet, sauced mango sticky rice. It also softens the punch of a hot-and-sour soup and enriches many sauces and desserts across the region. There is no perfect swap, though a thinned dairy cream or a nut-based milk can stand in where the coconut flavour is not central to the dish. For sweet uses, the thicker cream skimmed from the top of a tin is often exactly what is wanted. For more on the pantry it anchors, see the Asian pantry guide.

Thai
Thailand's best-loved dessert — warm glutinous rice steeped in sweet, salted coconut cream, served with ripe mango and a sprinkle of toasted mung beans.

Thai
A mild, warmly spiced beef curry with potatoes and peanuts — slow-simmered in coconut milk with cardamom, cinnamon and tamarind for a rich, rounded depth.

Thai
A bright, fragrant coconut curry built on a fresh green chilli paste fried until it splits — with chicken, aubergine, basil and kaffir lime.
See also the Asian pantry guide for more on stocking these ingredients.
Both are pressed from grated coconut flesh, but they differ in richness. Coconut milk is thinner, made with more water, and pours easily — ideal for curries, soups and rice. Coconut cream is the thicker, fattier portion, with far less water, used where extra richness is wanted or to crack a curry paste. In a tin of full-fat coconut milk the cream often separates and rises to the top, so the two can be scooped apart and used for different purposes from one can.
Coconut milk can separate into oil and solids when boiled hard or cooked too long, especially the lower-fat versions. In many Thai curries this splitting is deliberate and welcome: the cream is simmered until the oil breaks out, then the curry paste is fried in that fragrant fat before liquid is added back. For smooth soups, keep the heat gentle and avoid a rolling boil. A quick stir or whisk usually brings a split sauce back together.
Yes. Transfer any unused coconut milk to a sealed container and refrigerate it, where it keeps for about four or five days. It will thicken and may separate in the cold, which is normal — simply stir or warm it gently to recombine. For longer storage, freeze it in portions or ice-cube trays; the texture becomes slightly grainy once thawed but it works perfectly well in cooked dishes such as curries and soups.
Light coconut milk is simply full-fat diluted with more water, so it has a thinner body and milder coconut flavour. It works for lighter soups and where richness is not the point, but in a curry it produces a watery, less luxurious result and is more prone to splitting. For full-bodied dishes, full-fat is far better. To approximate full-fat from light, a spoonful of coconut cream stirred in restores some of the missing richness.