Four-Fruit Iced Sweet Soup

Four-Fruit Iced Sweet Soup is a traditional Minnan dessert eaten across Zhangzhou, Quanzhou, Xiamen and Taiwan, with Zhangzhou often named as one of its birthplaces; folk accounts trace it as far back as the Tang or Song, though the exact origin cannot be pinned down. Its earliest firm record is the 1931 Guide to Xiamen, which lists "four-fruit soup" among sweet sundries; the 1940 New Guide to Xiamen describes a version of tapioca-starch balls, adazi and sago dressed in white sugar and boiling water. The dish rests on shihuagao, a jelly that coastal Minnan people had learned to boil, set and eat from the seaweed shihuacai well before the Ming. Originally the "four" really meant four ingredients — accounts differ between mung bean, Job's tears, adazi and lotus seed, or mung bean, red bean, white fungus and grass jelly, with one tradition holding the authentic four should all be white. In the early 1990s Ding Bingzheng, fourth-generation heir of the century-old Quanzhou house Bingzhengtang, began letting customers freely combine dozens of toppings over his shihuagao, and the pick-your-own bowl became the form known today; in 2024 Xiamen even issued a group standard requiring a bowl to be at least seventy percent toppings.

Cold first, then a procession of textures. The shihuagao gives a clean, brittle snap that breaks soft, melting almost to water; the starch balls are springy and chewy, taro balls fudgy, mung beans and lotus seeds tender and faintly starchy. Shaved ice crunches and thaws into the syrup, which is lightly, cleanly sweet — sugar-water or floral honey — never cloying. The whole bowl is barely scented, faintly grassy-marine from the jelly, and finishes shockingly cool.

The dish is built on agar. Boiling the dried red alga Gelidium (shihuacai) for hours extracts its water-soluble polysaccharides — agarose and the sulfated agaropectin — which dissolve hot, are strained through cloth, and set on cooling into shihuagao. Agar gels with a wide hysteresis: it melts only near 95°C yet sets around 37°C, so the jelly holds its shape firmly in iced syrup and on the tongue, unlike gelatin, which melts at body temperature. Agar's network is also far more brittle than gelatin's, giving the signature clean, pre snap rather than a wobble, at a fraction of the calories. Mung beans and lotus seeds are simmered until their starch gelatinises and softens; the starch balls (adazi) and taro balls are cooked through to a chewy, gelatinised core. Everything is chilled, then shaved or crushed ice is added last — its melting absorbs latent heat and pulls the whole bowl below room temperature for the cooling effect that defines the dessert.