Aromatic bases & spice pastes
Green Kroeung
គ្រឿងខៀវ · A green-colored member of the Khmer kroeung family of spice-herb pastes, distinguished from yellow and red kroeung by the use of fresh green chilies, a reduced quantity of fresh turmeric, and the inclusion of wild betel leaves (slak sak, Piper sarmentosum). It is pounded or processed into a fragrant wet paste that functions as a reusable aromatic foundation for soups, curries, steamed dishes, and stir-fries across Cambodian cuisine.
The formula
≈3:3:2:1.5:1:1 lemongrass:shallots:garlic:galangal:green chili:slak sak; turmeric minimal
No canonical ratio exists; proportions vary by cook and dish. Yellow kroeung weight benchmarks (≈90 g lemongrass, 90 g shallots, 60 g garlic, 39 g galangal, 15 g turmeric) form the starting point, with turmeric reduced and green chili plus slak sak added for the green variant.
Identity
- Khmer (Cambodian) aromatic base — not a finished dish
- Reusable wet paste component
- Color derived from fresh green chilies and herbs rather than turmeric
- Distinguished by inclusion of wild betel leaf (slak sak)
- Traditionally pounded in a heavy granite mortar and pestle
- Member of the kroeung family (green / yellow / red)
Ingredients
| Aromatics | Lemongrass (inner stalks, thinly sliced) | Provides the dominant citrus-grassy backbone; slice thinly to break tough fibers |
| Aromatics | Fresh galangal | Sharper, more piney than ginger; pound first to release fibers |
| Aromatics | Garlic cloves, peeled | Adds pungent sweetness when freshly pounded |
| Aromatics | Shallots, peeled | Contributes moisture and mellow allium sweetness that carries the paste |
| Aromatics | Fresh green chilies | Defines the green color and provides heat; seeded for milder paste |
| Flavor | Wild betel leaves (slak sak / Piper sarmentosum) | Signature green-kroeung herb with a peppery, eucalyptus-like note |
| Aromatics | Kaffir (makrut) lime zest and finely shredded leaves | Bright citrus aroma that lifts the heavier rhizomes |
| Aromatics | Fresh turmeric | Used sparingly in green kroeung to preserve green color while adding earthiness |
Method
- 1Peel and thinly slice the lemongrass (inner cores only), galangal, shallots, garlic, and turmeric; remove chili stems and seeds if a milder paste is desiredThin, uniform slicing lets the mortar break cell walls evenly and prevents fibrous lumps in the paste
- 2Pound galangal and lemongrass first in a stone mortar, working in a circular motion until fibers are crushed and a fibrous mash formsThese are the toughest rhizomes and need the most mechanical work before finer aromatics are added
- 3Add turmeric, garlic, and shallots and continue pounding until the mixture releases moisture and becomes a coarse wet pasteSofter aromatics break down quickly once liquid is drawn from shallots and garlic
- 4Add kaffir lime leaves (shredded) and zest, then pound briefly to incorporateLime oils bruise and dissipate with extended pounding; late addition preserves their bright aroma
- 5Add fresh green chilies and wild betel leaves (slak sak) and pound just until evenly dispersed and the paste turns a vivid greenLate addition keeps chili heat bright and prevents the green color from dulling under prolonged pounding
- 6Transfer paste to a jar, press a thin layer of oil over the surface, seal, and refrigerate or freezeAn oil cap and cool storage slow oxidation that would turn the green paste brownish
Techniques that matter
Mortar-and-pestle pounding
Shears cell walls rather than slicing them, releasing essential oils from lemongrass, galangal, and lime leaves more completely than a blender
Sequential pounding (toughest to most delicate)
Prevents over-working delicate herbs like lime leaves and slak sak, which would turn bitter or lose color
Oil cap sealing
Excludes oxygen to preserve the vivid green color that oxidizes rapidly once the paste is exposed to air
Variations & derivatives
Yellow KroeungCambodia (general)
Same paste with more turmeric and dried red chilies swapped for green; the canonical paste for fish amok
Red KroeungCambodia (general)
Uses dried red chilies and full turmeric; deeper color and smoky heat for richer curries
Royal KroeungCambodian royal cuisine
More elaborate paste using lesser galangal (kcheay), fingerroot (kcheay tuk), and Kaempferia galanga
Individual KroeungHome cooking
Custom pastes made for one specific dish, adding dish-specific herbs or proteins to the base paste
Used in these dishes
Substitutions
- Wild betel leaf (slak sak) → Thai cha plu (Piper sarmentosum) leaves — Same species widely available in Thai markets; flavor is the closest match
- Wild betel leaf (slak sak) → Vietnamese mint (Polygonum/Persicaria odorata) — Adds a peppery-minty note but lacks the eucalyptus quality of slak sakchanges result
- Fresh turmeric → 1 tsp ground turmeric per 15 g fresh — Ground turmeric is more concentrated and slightly more bitter; reduces total paste color shift
- Fresh galangal → Frozen galangal or galangal paste — Convenience substitute; pound slightly longer to compensate for cell-wall damage
- Fresh green chilies → Green bird's eye chilies (Thai prik kee noo) — Common substitute with comparable heat; adjust quantity to taste
Troubleshooting
Paste turns brown rather than staying green
Oxidation from prolonged pounding, exposure to air, or too much turmeric → Add chili and slak sak last, store under a thin oil cap, and reduce turmeric to the minimum needed for flavor
Paste tastes bitter or grassy
Lemongrass not pounded finely enough, or lime leaves over-pounded → Slice lemongrass thinner and pound further; add kaffir lime leaves later in the sequence
Paste is watery and separates
Insufficient pounding or too much moisture from chilies and shallots → Drain excess liquid before pounding, or finish with a brief dry-fry in a tablespoon of oil to drive off moisture
Paste is too fiery
Chili seeds and pith were retained → Seed and devein green chilies, or reduce chili quantity by one-third and balance with extra shallot