Entree: Timor-Leste – Southern Culinary Region – Tapai (Fermented glutinous rice or cassava that develops a sweet-sour, mildly alcoholic flavor used as a starchy staple)

Serving Size: 6

Approximate Time

Prep 35 min

Cook 30 min

Additional 48 hrs

Total 48 hrs 30 min

Ingredients

- 4 cups (800 g) glutinous (sticky) rice, rinsed
- 4 cups (960 ml) water (for soaking and steaming), divided
- 1/4 cup (50 g) granulated sugar, optional to boost fermentation
- 1/4 tsp (1 g) tapai starter (ragi) or powdered rice yeast
- Banana leaves or clean food-grade plastic wrap for wrapping
- Optional for serving: grilled fish or salted dried fish, as desired

Instructions

1. Prepare the rice: Rinse 4 cups (800 g) glutinous rice until water runs clear. Soak the rice in cold water for 4–6 hours, then drain. Transfer to a steamer and steam with about 4 cups (960 ml) water (or per your steamer's guidance) until the grains are tender and glossy, about 25–30 minutes. Allow the steamed rice to cool to warm (not hot), around body temperature.
2. Inoculate and ferment: In a small bowl mix 1/4 cup (50 g) sugar (if using) into the warm rice to help feed fermentation. Sprinkle 1/4 tsp (1 g) tapai starter evenly over the rice and mix thoroughly to distribute the starter. Portion the rice into a shallow container or form into individual cakes about 1–1.5 inches (2.5–4 cm) thick. Wrap tightly in banana leaves or plastic wrap to retain moisture and warmth.
3. Fermentation: Place wrapped rice in a warm location (75–86°F / 24–30°C) and allow to ferment for 48–72 hours. Check after 36–48 hours; the rice should develop a sweet, slightly alcoholic aroma and become softer and slightly translucent. Fermentation time depends on ambient temperature and starter strength.
4. Finish and serve: Once fermented to taste, transfer tapai to the refrigerator to slow fermentation and serve within a few days. In Timor-Leste it is commonly eaten as the starchy component of a meal alongside grilled or dried fish, coconut-based sauces, or simply on its own. To serve warm, gently reheat by steaming briefly or pan-warming; do not overheat or you will kill the delicate flavors.