Sereh Lemongrass in Indonesian Cooking: Uses and Preparation
Sereh lemongrass is a tall grass whose pale lower stalks are a core aromatic in Indonesian cooking. The plant grows in clumps in home gardens and in the yards of village houses, and bundles of the stalks are sold in many traditional markets. Cooks use the tender lower part of the stalk, the pale and fleshy section near the root, and they set aside the tough green upper leaves except when making drinks or infusions. Across Java and Bali, sereh is one of the first ingredients a cook reaches for when building a spice paste or a simmering broth. The serai page covers the same plant under its Malay name.
Sereh lemongrass in Indonesian cooking: uses and preparation
The question most cooks ask first is which part of the stalk to use and how to prepare it. The answer depends on the dish, but the principle is the same everywhere: the lower third carries the scent, the upper part is too fibrous to eat, and the way the stalk is cut or struck changes how much of its oil reaches the food. The parts, the methods, the common dishes and the practical steps that make sereh work in a kitchen are set out below.
Which part of the stalk to use
The useful part is the bottom section of the stalk, where the layers are pale, smooth and tender. The outer leaves come away as you peel them back, and the inner core is what goes into the pot. Cooks who want to use the whole stalk in a broth or drink often leave it intact, bruise it and let it simmer, then lift it out before serving. The green top is tough even after long cooking, so most cooks trim it off before the stalk goes into a pan.
A firm, smooth and heavy stalk is the sign of a good buy. Stalks that feel light or soft, or that have dried edges, have lost much of their scent. When you look at a bundle in the market, check the base for a clean, pale colour and run your thumb along the stalk to feel for firmness.
Preparing sereh for pastes, soups and drinks
The three main methods of preparation are knotting, bruising and fine slicing or pounding. A stalk tied in a knot can be left in a pot and fished out later, which suits dishes that cook for a long time. Bruising is the method for soups, stews and drinks: the stalk is laid on a board and struck firmly with the flat of a knife until it splits and releases its oil. Fine slicing or pounding is used when the lemongrass has to melt into a paste.
For a paste, trim the root end, remove the outer layers and slice the pale core very thinly, or pound it in a mortar with a little salt until it breaks down. Some cooks pound the lemongrass together with the other aromatics so that the citrus note spreads evenly through the mixture. Fresh lemongrass is best prepared just before use, since the cut surfaces lose their aroma and dry out quickly when left exposed to the air.
Lemongrass in bumbu, the seasoning pastes of Indonesia
Bumbu is the local word for seasoning paste, and sereh is one of the fresh aromatics that go into many of them. A typical paste pounds lemongrass with shallot, garlic, chilli, galangal and turmeric, sometimes with ginger, candlenut or other roots, until smooth. The paste is then stir-fried in hot oil before any main ingredient is added. That first frying matters: it releases the aroma of the lemongrass and softens its raw edge, so the flavour blends into the dish rather than sitting on top of it.
Balinese cooking uses a related but distinct family of pastes. Lemongrass appears in some versions of the Balinese base mixture known as base genep, although the exact list varies widely from one cook to another, and many recipes leave it out. Some versions use it prominently, while others use a different set of roots and dried spices. The point for a home cook is that sereh is a flexible ingredient in these pastes, and it can be adjusted to the taste of the dish and the household that cooks it.
The bumbu dasar page explains how the basic pastes are built, and it shows where sereh sits beside the roots and leaves that surround it in the kitchen.
Soups, curries, stir-fries and grilled dishes
Sereh gives soups a clean, lemony lift without the sharpness of lime. A bruised stalk dropped into a broth releases its scent slowly, and the broth takes on a fresh, grassy edge. In curries and stir-fries, sliced or pounded lemongrass is added early so that its aroma spreads through the sauce. In grilled and roasted dishes, a bruised stalk is sometimes laid under or alongside the meat so that its perfume rises during cooking.
Lemongrass also turns up in seafood dishes, where its freshness suits fish and prawns. One common approach is to add sliced stalk to a light broth or coconut liquid, then fry the seafood in a spice paste that already contains the grass. The result is a dish with lift and balance, rather than one that tastes only of the sea or only of chilli.
Each use calls for a slightly different cut. Fine slices or pounded paste suit fried dishes, bruised lengths suit soups, drinks and grilled meats, and finely shredded stalk can be used in a marinade. Matching the cut to the cooking method is one of the quickest ways to improve a dish that uses sereh.
Sereh in drinks, teas and herbal traditions
Wedang sereh is a boiled lemongrass drink, made by simmering bruised white stalks in water and sweetening the result. Rock sugar is one common choice, and some cooks prefer honey or no sweetener at all. The drink is served warm or cooled, and it is one of the most familiar uses of the stalk outside the kitchen.
Lemongrass is also a familiar part of home herbal drinks in Indonesia. The traditional claims made for it are better understood as long-standing household custom than as medical treatment. A reader who wants to use sereh for a particular health concern should speak to a health professional rather than rely on a kitchen habit.
Storing lemongrass so the aroma lasts
Fresh stalks keep for a reasonable time in the refrigerator when they are wrapped in paper or a dry cloth, which stops them from sweating. For longer storage, cooks freeze the stalks whole or freeze prepared slices in small portions, ready to drop into a pan. Frozen lemongrass is harder to slice when it is hard, so many cooks partly thaw it first or cut it while it is still firm and then return the pieces to the freezer.
Dried lemongrass is sold in some shops, but it has far less aroma than fresh stalks and is a poor substitute in pounded pastes, where the fresh oil matters most. If you have to use dried lemongrass, expect a softer flavour and use more of it, and avoid it in dishes that depend on the bright, fresh scent of the stalk.
Lemongrass with coconut, palm sugar and galangal
Lemongrass is often cooked with coconut milk, which rounds off its sharpness and gives a creamy base for soups and curries. If you want to see how the two work together, the santan page explains how coconut milk forms the base of many of these dishes.
Palm sugar adds a deep, rounded sweetness that suits drinks, desserts and the sweeter side of savoury dishes. Cooks sweeten lemongrass drinks with several kinds of sugar, and the palm sugar page covers the sugar most often used alongside them in Indonesian kitchens.
Galangal is the other root that appears beside lemongrass in many pastes. Its taste is different from the lemony scent of sereh, and the two are often pounded together to build the depth of a base. The galangal page covers the fresh root and how it is prepared, which helps a cook see why the two aromatics are so often paired.
Common questions about cooking with lemongrass
Can lemon peel replace lemongrass?
Lemon peel gives brightness, but it does not carry the grassy character of the stalk. A dish made with lemon peel will taste brighter and less rounded, so it is better to think of lemon peel as a different ingredient rather than a stand-in.
Should the stalk be removed before eating?
Yes, in most dishes. The fibres do not break down fully even after long cooking, so cooks take the bruised stalk out of a soup or drink before serving, or they chop the pounded paste so finely that the fibres disappear into the sauce.
How much lemongrass should a dish use?
There is no fixed amount. A paste for a family meal often calls for a few stalks, and the exact number depends on how strong the stalks are and how much the dish needs. Taste as you go and add more only when the fresh scent is missing.
Sereh in daily Balinese cooking
Lemongrass appears in many Balinese dishes, where it is used in the seasoning of fish, chicken and vegetable dishes, and in the spice pastes that form the base of many everyday meals. The fresh scent suits the island’s seafood and poultry. Visitors who want to see how it is used in practice will find it in many of the dishes covered in the Balinese food guide.
A visitor who eats in a family home or a village kitchen is likely to taste sereh before noticing it. Asking which dishes use it, and how the stalk was prepared, is a good way to learn the local way of cooking and to understand why the same ingredient can taste so different from one household to the next. The rebung and aromatic leaves and citrus pages cover other ingredients that appear in the same kitchens.