That deep red-orange mound on the banquet table isn't dyed. It comes from "xoi gac" — sticky rice steamed with the pulp of the gac fruit — and in Vietnam (베트남 / 越南 / ベトナム) it shows up at weddings, Tet spreads, and full-moon offerings with the kind of regularity that signals the dish means something beyond flavor.
What Is Gac Fruit?
Gac (Momordica cochinchinensis) is a spiky, oblong gourd that ripens from green to a bright scarlet-orange. It grows on climbing vines across Southeast Asia but is especially associated with northern and central Vietnam, where it fruits from roughly November through January — conveniently timed for Tet (뗏 (베트남 설날) / 越南春节 / テト (ベトナム旧正月)) season. The edible part for xoi gac is the membrane surrounding each seed: waxy, intensely pigmented, and carrying a faint, almost fatty richness from high concentrations of lycopene and beta-carotene. A single fruit can color several kilograms of glutinous rice.
The flavor it adds is subtle — a mild, slightly grassy sweetness — so xoi gac is never really about taste alone. It's about the color, and the color means luck.
The Symbolism Behind the Red
In Vietnamese tradition, red and gold are the colors of celebration and good fortune. Xoi gac sits alongside "banh chung" on Tet altars and appears at wedding banquets as a statement: this meal matters, this occasion is auspicious. Grandmothers in Hanoi households will tell you the dish was already present at court ceremonies in the Le dynasty, though the earliest written recipes date to the nineteenth century. The symbolism has persisted stubbornly through every social upheaval — xoi gac still anchors the first course at village weddings from the Red River Delta to the Central Highlands (중부 고원 / 中部高原 / 中部高原).
It's also common at death anniversaries and full-moon offerings, which surprises visitors who associate the color red purely with celebration. In Vietnamese ritual logic, red honors the deceased just as it honors the newborn.
How It's Made
The method is straightforward but timing-dependent. Glutinous rice — specifically the round-grain variety called gao nep — is soaked overnight, then mixed with the gac membrane (manually extracted from around the seeds), a splash of rice wine or white spirit, and salt. Some cooks add a small amount of coconut milk; others don't. The mixture steams for 25–30 minutes until the rice is fully cooked and uniformly stained.
The rice wine serves two purposes: it helps the pigment distribute evenly and adds a faint alcoholic note that burns off during steaming. Without it, the color can streak rather than saturate. Good xoi gac should be a consistent deep orange-red all the way through each grain, not patchy.
Fat content and texture
Xoi gac is richer than plain steamed glutinous rice. The gac membrane's natural oils give the finished dish a slightly glossy surface and a denser, more cohesive texture. It should hold its shape when scooped but still be tender — not gummy or stiff. If it's too dry, the gac ratio was too low or it was overcooked.
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Regional Variants
North (Hanoi (하노이 / 河内 / ハノイ) and Red River Delta): The canonical version. Minimal additions, savory-leaning, often served as a standalone dish rather than a side. Street vendors in Hanoi sell it by the "phan" (portion) from early morning, shaped into rough mounds and sometimes topped with a pinch of sesame salt. This is the version you'll find at Tet altars.
Central (Hue, Da Nang): Less common as an everyday food, appearing mainly at weddings and festivals. Hue versions occasionally incorporate a small amount of mung bean paste stirred through, adding a subtle sweetness that the north generally avoids.
South (Saigon and Mekong Delta (메콩 델타 / 湄公河三角洲 / メコンデルタ)): The south has a sweeter palate and it shows. Xoi gac here is often served with shredded coconut and sugar, sometimes alongside "com tam"-style toppings as part of a mixed sticky rice platter. In Can Tho and the Mekong provinces, it appears at dawn markets as a breakfast item.
How to Order It
At a sticky rice stall (look for "xoi" signs, often handwritten on a plastic board outside the vendor's cart), point at the red mound and say: "Cho toi mot phan xoi gac" — one portion of xoi gac. Expect to pay 15,000–25,000 VND for a street portion. At a wedding or restaurant, it will be pre-plated. You don't need to request anything — it comes as it is.
If you want coconut and sugar (southern style), ask: "Co dua bao khong?" — do you have shredded coconut? Most southern vendors will have it.
Xoi gac is a morning food by tradition. Sticky rice stalls in Hanoi and Saigon (사이공 / 西贡 / サイゴン) typically sell out by 9 or 10am.
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Where to Try It
Xoi Yen, 35B Nguyen Huu Huan, Hanoi Old Quarter. The most referenced xoi stall in Hanoi, open from around 6am until stock runs out (often by 8:30am on weekends). Their xoi gac is textbook northern style — dense, well-colored, served with a small packet of sesame salt. Expect a short queue.
Ba Lan Xoi, 44 Hang Be, Hanoi. A quieter alternative in the same Old Quarter neighborhood. The portions are slightly larger and the vendor often has gac in season from November onward, so the color is especially vivid in the weeks leading up to Tet.
Xoi Bap Ba Tuoi, 73 Vinh Khanh, District 4, Saigon. A southern-style mixed sticky rice stall that does xoi gac with coconut and pandan-leaf wrapping. The neighborhood is a legitimate street food corridor — pair it with a "ca phe sua da (연유커피 / 越南冰咖啡 / ベトナムアイスコーヒー)" from the shop next door.
Practical Notes
Gac fruit is seasonal: if you visit outside November–January, vendors may use frozen gac membrane or skip the dish entirely. Outside those months, what's labeled xoi gac in tourist-facing restaurants is sometimes colored with annatto or red yeast rice instead — it looks similar but lacks the gac's characteristic waxy texture. Tet (late January or early February depending on the lunar calendar) is the single best moment to eat it, when every household in Hanoi seems to have a batch on the altar.
Last updated · May 26, 2026 · independently researched, never sponsored.
