Did You Know? The Taiwan Egg Yolk Pastry Was Invented in the 1980s

Taiwan’s Mid-Autumn Festival (中秋節) falls tomorrow — Friday, 25 September 2026 — and it opens a four-day weekend that runs straight through Teachers’ Day on Monday the 28th. Offices shut, the freeways fill, and gift boxes move by the truckload. Open one this week and the thing most likely to be sitting inside is not a mooncake. It is a glossy golden dome about the size of a plum, scattered with black sesame: the Taiwan egg yolk pastry.

Here is the part that surprises people, Taiwanese people included. It is barely forty years old.

What is actually inside one

蛋黃酥 (dàn huáng sū) is built in three layers, and the order matters. Outside is a laminated pastry crust — two doughs, one water-based and one fat-based, folded and rolled against each other until the shell bakes up in fine flaking sheets rather than a single crumb. Under that sits a thick ring of sweet bean paste, usually red bean or mung bean. And dead centre, whole and unbroken, a salted duck egg yolk (鹹蛋黃): round, deep orange, faintly oily, and salty enough to cut through everything around it.

Slice one in half and the whole design gives itself away. There is a little moon inside the pastry. That is the joke, and it is the entire reason the thing works on a festival table.

Invented in a Taichung bakery, not an ancient kitchen

The Taiwan egg yolk pastry traces back to 陳增雄, third-generation owner of the 陳允寶泉 bakery in 豐原 (Fengyuan), Taichung. His problem was a practical one: traditional mooncakes were big, flat and dense, too much for one person to finish and awkward to share politely.

So he took an older festival pastry called the 狀元餅 — the “scholar’s cake,” named for the top rank in the imperial exams, and historically the grand prize in a Mid-Autumn dice game where players gambled for pastries by rank. He tucked a salted duck egg yolk inside it, shrank it to single-serving size, and rounded the flat top into a half-sphere that follows the curve of the yolk itself. His grandson, now running the fifth generation of the shop, still points to a baking-trade magazine feature from August 1986 as the paper trail. The industry broadly credits the Fengyuan shop with it.

Taichung has form here. It is also the home of the flaky suncake, and of 犁記, whose 綠豆椪 mung-bean pastry has carried the bakery’s name since 1894. If Taiwan has a pastry capital, it is not Taipei.

One hundred million duck eggs

The scale of what 陳增雄 started is genuinely hard to picture. By Council of Agriculture figures, Taiwan’s egg yolk pastries got through roughly 100 million duck eggs for the 2022 Mid-Autumn season alone — on an island of 23 million people.

The demand has gone somewhere strange, too. The most sought-after maker, 陳耀訓·麵包埠 in Taipei, does not sell its Mid-Autumn boxes through a bakery queue or an ordinary website. It sells them through Tixcraft, the concert ticketing platform — same system, same scramble. The 2026 window opened at 12:30 on 28 July, at NT$900 for a box of eight, capped at eight boxes a person, in-store pickup only, and it was gone in minutes. Taiwanese media call it the hardest pastry in the country to buy.

The takeaway

Two of the three things that make a Taiwanese Mid-Autumn feel Taiwanese are modern inventions. The Taiwan egg yolk pastry came out of a Fengyuan bakery in the mid-1980s, and the island-wide barbecue that fills every pavement on festival night was seeded by a soy sauce commercial in the same decade. Only the pomelo is genuinely old.

Tradition on this island is not always inherited. Quite a lot of it was simply made — recently, deliberately, and usually by someone trying to solve a small problem well.

That is the kind of detail we build our designs around. Have a browse of our Taiwan-themed tees, prints and accessories — and happy Mid-Autumn from all of us.