A silken custard nestled within pumpkin, sweetened by palm sugar and kissed by coconut milk.
A festival sweet eaten at Pchum Ben (Ancestors' Day, late September/early October) and Khmer New Year. The technique — steaming custard inside a vegetable shell — runs across Southeast Asia (Thai sangkaya fak thong is the closest cousin), suggesting shared roots in the Mon-Khmer cooking tradition predating the regional kingdoms. Cambodia's version uses more duck egg and a darker palm sugar than the Thai.
Festival sweet for Pchum Ben (late September) and Khmer New Year. Steam must stay below boiling — gentle 85°C bain-marie. Hard boil curdles the custard into pinholes. Duck eggs, not chicken: the gamy yolk survives palm sugar's caramel weight.
A small kabocha or hokkaido pumpkin, hollowed out, filled with custard of duck eggs, palm sugar, and coconut cream, then steamed whole until the custard is just-set. Sliced like a cake at the table. The custard is darker than Western flan — palm sugar's caramel notes — and the pumpkin walls go silky against the spoon.
Steam temperature must stay below boiling — gentle bain-marie steam, around 85°C. Hard boiling curdles the custard into pinholes and weeps water. Test by inserting a skewer near the center; clean withdrawal means done, slight wet film means another five minutes. Duck eggs (not chicken) give the richer, slightly gamy yolk that survives palm sugar's strong caramel.
Variations
Phnom Penh family version (whole kabocha, sliced cake-style); Battambang uses sugar-pumpkin halves; Thai sangkaya fak thong is the closer cousin, lighter on egg; Khmer-Australian Sydney shops slice cold and serve like flan.
On the Palate
Where Sangkhya Lapov sits in the Cambodian flavor cloud
Ingredients
How it's made
5 steps · 1 hour 30 min
- 113 min
Cut the top off the pumpkin and remove seeds.
- 210 min
Mix coconut milk, eggs, palm sugar, salt, and vanilla in a bowl.
- 317 min
Pour the mixture into the hollowed pumpkin.
- 433 min
Steam the filled pumpkin until set.
Watch outSteam it gentle, not on a hard boil — big rolling steam curdles the custard into pinholes and weeps water; you want a lazy, barely-shivering steam so it sets smooth like tofu pudding.
- 517 min
Cool before slicing into wedges for serving.
Watch outTest with a skewer near the center — comes out clean it's set, comes out with a wet film give it another five minutes; and let it cool fully before slicing or the wedges collapse.
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