Winter Melon Tea (Dongguacha): The Caramel-Brown Summer Drink Taiwan Has Been Sipping Since Before Bubble Tea Existed

Before bubble tea took over the world, before Taiwan was famous for boba, locals were already drinking something else from sweating glass jugs on every street corner: dongguacha (冬瓜茶) — winter melon tea. It is the color of weak coffee, sweet like a memory, and so embedded in Taiwanese summer that asking a local about it triggers an immediate childhood flashback.

Here is the wild part: it has nothing to do with winter, and it is not really tea.

What Dongguacha Actually Is

Winter melon (also called ash gourd or wax gourd) is a massive green-skinned squash that grows across Taiwan in late summer. Despite the name, it ripens in hot weather — the "winter" refers to the chalky white wax coating that develops on mature fruit, making it look frosted.

To make dongguacha, cubed winter melon is slow-simmered with raw cane sugar (sometimes brown sugar or rock sugar) for four to six hours until the flesh dissolves completely. What is left gets reduced further into a thick, dark amber syrup, then poured into molds and cooled. The result is a dongguacha sugar brick — a hard, fudgy slab of caramelized winter melon sugar that vendors shave off, dissolve in hot water, and serve over ice all summer long.

The flavor is hard to pin down. Imagine browned sugar with a faint vegetal whisper and the rounded mouthfeel of molasses. It is sweeter than tea but lighter than soda — the kind of drink that resets a body baked by Kaohsiung humidity.

A Drink Older Than Modern Taiwan

Dongguacha vendors were documented in Tainan during the late Qing dynasty (1800s), when itinerant sellers would push wooden carts through neighborhoods calling out their flavors. Tainan still considers itself the spiritual home of the drink, and the city’s Yi Ku Tang (義豊冬瓜茶) shop on Yongfu Road has been pouring it since 1912 — over a century in the same spot.

For most of the 20th century, dongguacha was the default cold drink at Taiwanese night markets, served alongside grilled squid and stinky tofu. Then bubble tea arrived in the 1980s and stole the spotlight — but locals never let dongguacha go.

How to Spot the Real Thing

Convenience stores sell bottled dongguacha (Apple Sidra’s parent company makes the most common brand), but it is a sugary shadow of the original. To taste the real version, look for shops with:

• A visible brown sugar brick being shaved into a metal pot — that is your tell.
• Steam rising from a back-room cauldron — meaning they reduce their own syrup.
• The character 純 (pure) on the menu — signifying no artificial caramel coloring.

Modern shops have also started layering dongguacha with milk (dongguacha naicha) or with fresh lemon (dongguacha ningmeng) — the latter is arguably Taiwan’s perfect summer drink. The tartness slices through the molasses depth like a clean knife.

Where to Try It This Summer

Three legendary stops:

• Yi Ku Tang Dongguacha (義豊冬瓜茶) — Tainan, since 1912. The benchmark.
• Two Cousins Lemon Winter Melon Tea (兩喜號) — Wanhua, Taipei. Their lemon version is the gateway drug.
• Any Tainan night market stall with a copper pot — trust your nose.

Speaking of summer drinks that built Taiwan’s identity, our island-themed merch collection has a Tainan street vendor tee that captures exactly this energy — the wooden cart, the sugar brick, the late-afternoon haze. Wear your dongguacha pride.

The Takeaway

Bubble tea gets the global glory, but dongguacha is what Taiwanese grandparents drink. It is older, simpler, and more honest — a single ingredient reduced into liquid sugar that somehow tastes like a place. If you visit Taiwan in summer and only try boba, you are missing the actual story. For more deep cuts on the island’s drink culture, our fruit tea guide and boba tea ordering guide are the next two reads.

Found a dongguacha shop you love? Reply and tell us — we are building a Taiwan summer drinks map.