INGREDIENT KNOWLEDGE
Lemongrass
Lemongrass is a fibrous tropical herb with a clean lemon aroma, floral freshness, and gentle herbal sweetness. It is especially important in Southeast Asian soups, curries, marinades, salads, and aromatic pastes.
What Is Lemongrass?
Lemongrass belongs to the genus Cymbopogon. The culinary stalk has tough outer leaves surrounding a tender, pale lower core. The aromatic oils are concentrated throughout the stalk but are released more effectively when it is bruised, sliced, or pounded.
Flavor and Aroma
Lemongrass smells strongly of lemon peel without having the same acidity as citrus juice. It is floral, grassy, slightly ginger-like, and refreshing. Long cooking softens its sharper notes while pounding creates a much more intense aroma.
How to Choose Lemongrass
- Choose firm stalks with plump, pale bases.
- Look for fresh green upper leaves rather than completely dried, brittle stalks.
- The base should release a strong lemon fragrance when cut or crushed.
- Avoid stalks with mould, sliminess, or extensive browning.
Storage
Refrigerate whole lemongrass wrapped or covered to limit drying. Trimmed stalks can also be frozen for longer storage and used directly in cooked dishes. Finely chopped or pounded lemongrass should be refrigerated and used promptly for the best aroma.
Preparation Techniques
Remove dry outer layers and trim the root end. For infusing soups and broths, bruise the stalk with the side of a knife and cut it into large sections that can later be removed. For curry pastes, marinades, and minced preparations, use the tender lower portion and slice very thinly across the fibres before pounding or processing.
Cooking with Lemongrass
Lemongrass can be simmered in coconut milk, broth, or braising liquid; pounded into spice pastes; minced for marinades; or used to perfume grilled meats and seafood. Large fibrous pieces should normally be removed before serving unless the stalk has been minced extremely finely.
Lemongrass Across Cuisines
Thai cooking uses it in tom yum, curries, salads, and grilled dishes. Vietnamese cuisine uses it in marinades, soups, and stir-fries. Indonesian, Malaysian, Cambodian, Lao, and Filipino regional cuisines use it in spice pastes, stews, coconut-based dishes, grilled meats, and aromatic broths.
Pairings and Substitutions
Lemongrass pairs with ginger, galangal, turmeric, chilli, garlic, kaffir lime leaf, coconut milk, fish sauce, coriander, chicken, pork, beef, fish, and shellfish. Lemon zest can provide citrus aroma when lemongrass is unavailable, but it lacks the grassy, floral character. A little ginger plus lemon zest can be a more rounded substitute.
Common Mistakes
- Using tough outer layers as if they were tender vegetables.
- Failing to slice finely before pounding.
- Leaving large woody pieces in a finished dish without removing them.
- Using dried-out stalks with very little aroma.
Chef’s Notes
Decide first whether lemongrass is an infusion ingredient or an edible ingredient. For infusion, bruise large pieces and remove them. For eating, use only the tender core, slice across the grain extremely finely, and pound well.
Related Ingredients
Ginger, galangal, turmeric, kaffir lime leaf, chilli, garlic, coriander, and coconut milk are close culinary companions.