Tang-tsung (Sugar Onion): The "Resistance Sweet" Hidden in White Hollow Tubes

30-Second Overview: Tang-tsung contains no onion — it was once Taiwanese farmers' "disguise weapon" against colonial authorities. During the Japanese colonial period, sugarcane production was strictly controlled for export to Japan, and local people wanting sugar had to evade police searches. Farmers exploited the extensibility of cooling syrup to stretch it into hollow tubular structures by repeated pulling and folding — the shape mimicked scallion whites (蔥白), allowing them to pass inspection when hidden among vegetable baskets.⁵⁶ This precisely engineered "16 large holes, 16 small holes" structure makes tang-tsung dissolve instantly on contact with the tongue — crispy without sticking — making it the most grassroots-ingenious sweet flavor in island history.¹⁴

At Yilan's National Center for Traditional Arts in 2024, a group of visitors gathered in front of the "Tang-tsung Culture Hall." The air was thick with rich caramel sweetness and malt fragrance. Master craftsman Cho Chuang-ching lifted a three-kilogram mass of brown sugar paste heated to 120 degrees Celsius, hung it on a wooden post, and began pulling, folding, and stretching with flying hands.¹²²⁰

As air was forcibly driven into the sugar body, the workshop filled with a rhythmic "pop-slap" sound. In just ten minutes, the amber-colored translucent liquid was miraculously transformed into ivory white with a pearlescent sheen, finally setting into a silken, shimmering tube.²⁰ This sweet marathon of a century-long tradition — each pull is the weight of history.

From Chaoshan to Taiwan: A Sweet Flavor's Cross-Border Migration

The history of tang-tsung can be traced back to the Guangdong Chaozhou and Shantou region during the Qing dynasty.²⁴ Ming dynasty Chaozhou governor Guo Zizhang recorded in his Miscellaneous Notes from Chao (潮中雜紀): "Chao's onion-sugar is extremely white and extremely soft, with absolutely no residue."¹⁵ As part of the food culture of Minnan and Cantonese immigrants, tang-tsung traveled with migration waves through Hong Kong and Fujian, eventually taking root in Taiwan.²

In ancient Chaoshan custom, tang-tsung also played an educational role. On a student's first day of school, they would offer tang-tsung pancakes to worship Confucius — the "hollow" structure symbolizing "penetrating wisdom" (聰慧通竅), representing a clear mind and eager learning.¹⁶¹⁷ Folk tradition even produced a humorous rhyme about the first few days of school: "First day, sweet sugar-onion; second day, bamboo switch in line (teacher's cane); third day, hide in town; fourth day, nowhere to be found."¹⁶

The Forbidden Sweetness: Farmers' Disguise Technique

Taiwan's sugar industry entered its golden era under Japanese colonial rule — but that sweetness did not belong to Taiwanese people. The Japanese government implemented a sugarcane protection policy requiring all refined sugar to be shipped to Japan first, making it illegal for locals to privately produce or store sugar.⁵

To preserve a taste of sweetness, Taiwanese farmers deployed extraordinary creativity. They discovered that repeatedly stretching and pulling boiled syrup created countless tiny air pockets, transforming the color to white and the form to hollow — when cut into segments, it was virtually indistinguishable from scallion whites.⁵⁶ Farmers mixed these "disguised scallions" among baskets of real green onions for transport; when Japanese police patrols passed, they saw only full baskets of vegetables, not knowing precious sugar was hidden inside.⁵ This "resistance sweet" spread widely among Taiwan's people, earning it the alias "white sugar-onion" or "prosperity sugar" (富貴糖).¹⁵

The 16+16 Precision Craft: A Symphony of Physics and Chemistry

What makes tang-tsung captivating is not its sweetness but its unique mouthfeel — "snap and dissolve." This physical property comes from its extraordinarily complex internal structure.

Making tang-tsung requires mixing white granulated sugar, water, and maltose in a specific ratio, precisely heated to 120–130°C.³ As the sugar paste is hung on a wooden post and repeatedly stretched, the internal sugar molecular chains are forcibly rearranged and countless microscopic air bubbles are incorporated.³

A properly made tang-tsung, when cross-sectioned, must display "16 large holes, each large hole surrounded by 16 small holes."¹⁴ This precise structure causes the sugar to fracture extremely easily under pressure — the instant you bite, the air pressure release produces a crisp snapping sound that no machine-produced candy can replicate.

Sugar Arts Compared: Tang-tsung and Other Traditional Sugar Foods

At Taiwan temple fairs or historic streets, you can often find multiple varieties of traditional sugar craft. Though materials are similar, techniques and textures are entirely different:

The Masters Guarding the Old Taste

As the food industry has developed, the labor-intensive, weather-dependent craft of hand-pulled tang-tsung is nearly lost. A handful of masters in Taiwan continue to practice this craft:

• Yilan Wujie: Master Cho Chuang-ching, third-generation practitioner, performs his "sweet marathon" daily at the National Center for Traditional Arts.¹²
• Tainan Madou: Master Chen Heng-hsiung, pulling sugar by hand for over forty years, emphasizes this is a battle of strength and temperature.¹¹
• Sanxia Old Street: Master Cho (same lineage), guarding this old taste on the historic street.⁷
• Danshui and Chiayi: Old masters there as well, self-taught or family-inherited, persisting in fully handmade craft amid the pressures of humidity and temperature.⁹¹³

Conclusion: The Resilience Inside the Sweetness

The story of tang-tsung is, at its core, a story about resilience. It was born from oppression, grew through scarcity, and survived the wave of refined food culture by virtue of that one hand skill no machine can replace. When you bite into a piece of tang-tsung and hear that crisp snap, the sweetness inside carries the grassroots wisdom of Taiwanese farmers a century ago who refused to yield in their "sweet resistance."

Further Reading

• Jin Niujiao (金牛角) — Another Taiwanese sweet carrying local memory, spreading from Sanxia Old Street across Taiwan

References