Kuih Ko Sui (Steamed Palm Sugar Rice Cake)

Name: Kuih Ko Sui (Steamed Palm Sugar Rice Cake)
Prep time: 10 min
Cook time: 1 h 10 min
Total time: 1 h 10 min
Yield: 16 portions
Ingredients: oil; 100 g grated fresh coconut; 1 tsp salt; 2250 g water; 150 g palm sugar (gula Melaka); 110 g dark brown sugar; 3 pandan leaves; 180 g rice flour; 80 g tapioca starch; 1 tsp alkaline water