The Mooncake That Never Sees An Oven

Walk into any bakery in Da Nang this month and the boxes are already stacked to the ceiling, three weeks before anybody eats one. Open one and there are usually two kinds inside.

One is dark and glossy on top, stamped with a pattern, wheat flour, baked. That is banh nuong, and it is the one most foreigners picture when somebody says mooncake. It came here from Chinese cooking, the way a great deal of things did over a thousand years, and it belongs to half of Asia now.

The other one is white. Soft, matte, cool to the touch, the pattern pressed rather than baked into it. That is banh deo, and it is the one nobody explains to you.

Here is the strange part. It never goes in an oven. Not for a minute.

The skin is glutinous rice, roasted first and then ground fine, kneaded together with sugar syrup and water scented with pomelo flower. The filling, usually mung bean, lotus seed, or the mixed one with everything in it, is cooked separately beforehand. Both halves are already finished by the time they meet.

So the whole process is a kind of assembly. Make the syrup. Knead the skin. Press skin and filling into a wooden mould, turn it out, and it is done. No heat at the end. Nothing to wait for.

That is why it tastes the way it does, and it is why people who grew up with it describe it in a way that confuses everyone else. It is not really a cake. It is closer to something set than something cooked, and the perfume in it comes from a flower rather than from browning.

The pomelo flower is worth stopping on. It is the same tree that gives you the fruit that turns up on every ancestral altar and in every fruit tray. Somebody worked out a long time ago that you could take the blossom, steep it, and put the smell of the garden into a sweet. Once you have noticed it you cannot un-notice it, and it is the single thing that tells you whether a banh deo was made by somebody who cared.

Then there is the shape.

Traditionally banh deo was made big. Not the small squares in the gift boxes, but wide and round, close to the size of a serving tray, because the point was to look like the moon. Large, pale, complete. That was the whole idea, and it stands for the family coming back together, and specifically for a husband and wife staying joined.

Which is a lot of meaning to put into something you can eat in four bites.

The boxes you see this month are mostly a different business. In Vietnam the mooncake is a gift before it is a dessert, which is why they appear in September and why the packaging costs more than the cake. Companies send them. Neighbours send them. Half of them are still sitting unopened on a shelf in October.

But somewhere behind all that there is still a white cake, pressed out of a wooden mould, smelling faintly of a flower, shaped like a full moon on purpose.

If you buy one this month, buy one of each and eat them side by side. The difference is not subtle, and only one of the two was ever really from here.