Coconut Sticky Rice Cake
Also: Num Gom, Cambodian coconut pyramid cake, steamed coconut rice parcel
A Cambodian steamed sweet made from glutinous rice and sweetened coconut milk, folded inside banana leaves into a compact pyramid and steamed until cohesive and fragrant.
Identity criteria
- 1Glutinous (sticky) rice is the sole grain — regular rice destroys the texture entirely
- 2Coconut milk is mixed directly into the raw rice before steaming, not added as a topping
- 3Banana leaves are folded into a pyramid cone that both shapes and perfumes the cake
- 4Steaming is the only acceptable cooking method — baking or boiling breaks the form
- 5The finished cake holds its pyramid shape when unwrapped and is eaten at room temperature or warm
- 6Palm sugar or coconut sugar provides a caramel-edged sweetness distinct from white sugar
Components
glutinous rice (white or black)essentialMust be soaked 4–8 hours; pre-soak is non-negotiable for even gelatinisation
pandan leafoptionalSometimes layered inside the banana-leaf cone for fragrance
coconut milk (full-fat)essentialCombined with the soaked rice before wrapping; provides fat, moisture, and flavour
banana leavesessentialFunctional and flavour-active; impart a faint grassy, floral note and create the steam pocket
palm sugaressentialTraditional sweetener; gives amber depth; granulated white sugar is a weaker substitute
saltessentialSmall amount that sharpens coconut flavour
fresh grated coconutoptionalSprinkled on top after unwrapping in some regional versions
Technique
- Long cold soak of glutinous rice
- Hydrates the dense starch granules so they gelatinise evenly during steaming; skipping it produces a hard, chalky core
- Banana-leaf pyramid folding
- A tight, leak-proof cone is structurally necessary — loose folds let steaming water intrude, diluting the coconut milk and collapsing the shape
- Steaming to full cohesion
- Glutinous rice must reach full starch gelatinisation (≥90 °C internal) to bind without a binder; under-steaming leaves the centre raw; over-steaming makes it gummy and wet
Form & serving
- Served
- Wrapped in banana leaf; unwrap to reveal pyramid; eaten by hand
- Temperature
- Warm or room temperature — not hot, not chilled
- Portion
- One pyramid per person (palm-sized, roughly 80–120 g)
- Pairs with
- Cambodian jasmine tea · black iced coffee · fresh sliced mango · other Khmer festival sweets
Character
Flavour
Texture
Dense, cohesive, and uniformly chewy with a faint skin where the leaf contact caramelised the surface; neither wet nor dry — holds a clean cut
Eaten
Traditional Cambodian festival and ceremonial food; sold by street vendors especially around Buddhist holidays; offered at temple ceremonies and family ancestor-remembrance rites; also an everyday market snack in Cambodia
When
year-round · Pchum Ben (September–October) · Khmer New Year (April) · Cambodian wedding season
Variations & related
Regional variations
- Num Kom Krorm · Cambodia
Stuffed version with a sweetened mung bean or coconut cream filling at the centre
- Black glutinous rice version · Cambodia (rural regions)
Uses black sticky rice for a nuttier, earthier flavour and purple-black colour
- Pandan-tinted variant · Phnom Penh
Pandan juice added to the coconut-rice mixture for green colour and floral aroma
Related dishes
- sibling Khao Tom Mat
Thai banana-leaf sticky rice sweet; similar technique and materials, cylindrical not pyramidal
- sibling Bánh Tét
Vietnamese banana-leaf glutinous rice log; savoury-sweet, cylindrical, pork-filled variant common
- sibling Suman
Filipino glutinous rice wrapped in banana or palm leaves; same Southeast Asian banana-leaf tradition
- sibling Lemang
Malaysian/Indonesian glutinous rice cooked in bamboo; shared sticky-rice-in-leaf-wrapper lineage
- pairs-with Num Ansom
Cambodian banana-leaf sticky rice roll, often served alongside Num Kom at festivals
Substitutions
banana leaves → parchment paper or aluminium foiladmissible
Retains shape and function; loses the subtle herbal perfume the leaf imparts
palm sugar → coconut sugaradmissible
Nearly identical caramel depth; acceptable substitution
palm sugar → white granulated sugaradmissible
Functional sweetness only; loses the amber, molasses-edged complexity
full-fat coconut milk → light coconut milkinadmissible
Produces a noticeably less rich, drier cake that tends to crumble on unmoulding
glutinous rice → regular long-grain or jasmine riceinadmissible
Will not gelatinise into a cohesive sticky mass; the cake falls apart — the dish ceases to exist
glutinous rice → glutinous rice flour doughinadmissible
Creates a different product (mochi-adjacent); changes identity fundamentally
Common mistakes
- Using unsoaked or insufficiently soaked glutinous rice, producing a raw starchy core
- Folding the banana leaf loosely so steaming water floods the interior and washes out the coconut milk
- Substituting regular jasmine or long-grain rice — the dish will not bind
- Using coconut cream instead of coconut milk (too thick, blocks even hydration of the rice)
- Under-sweetening: the sweetness must be assertive enough to balance the neutral starchiness
- Steaming in a single dense layer without space between parcels, causing uneven heat and soggy bases
Provenance
Num Kom is an indigenous Cambodian sweet deeply embedded in Khmer ceremonial life, served at Pchum Ben (ancestors' festival), Khmer New Year, and wedding feasts. It belongs to a wider family of banana-leaf-wrapped glutinous rice sweets found across mainland Southeast Asia, but the pyramid cone form and coconut-milk-soaked rice preparation are characteristically Khmer. Its origins are pre-modern and oral; no contested rival claims exist.
Claimed by: Cambodia
References
- 1.Cambodian culinary oral tradition
- 2.Naomi Duguid — Burma: Rivers of Flavor (adjacent SE Asian rice-cake documentation)
- 3.FAO documentation of Cambodian traditional foods
- 4.Cambodian street-food and festival ethnography literature
Confidence: high