Rinse the rice, then soak it in water mixed with lye water for about 8 hours or overnight. Drain, rinse again, and mix with salt.
Prepare the banana leaves by wiping them clean, softening them over heat, and removing the thick center rib.
Place ¼ cup rice on a small banana leaf set over a larger leaf. Wrap the rice, fold into a packet, then pair them together and tie.
Arrange in a large pot and cover with water. Boil for about 2 hours, adding more hot water as needed to keep the suman submerged.
For the latik sauce, simmer the coconut milk, panutsa, salt, and vanilla until thickened.
Let the suman cool slightly, unwrap, and serve with latik sauce.
Notes
Glutinous rice: Also called sticky rice or sweet rice. Use a good quality glutinous rice for suman that’s soft, sticky, and chewy.
Lye water: An alkaline water that makes the rice chewier and lightly yellow. Too much can taste bitter.
Panutsa: A natural, unrefined sugar with a caramel-like sweetness. Muscovado or brown sugar works too.
Cooking Tips
Soak overnight: Helps the rice absorb the water and lye water evenly.
Soften the leaves: Warm banana leaves so they fold without tearing.
Wrap loosely: Leave room for the rice to expand as it boils.
Keep submerged: Add hot water as needed to keep the suman covered.
How to Store and Reheat
Store in the fridge for up to 1 week or freeze for up to 3 months. Keep latik sauce separate in the fridge for up to 1 week.
Steam or boil in the wrapper until warm. If microwaving, heat in short bursts just until warm to keep it sticky and chewy. Warm the latik sauce separately.