Bring 250 ml water, pandan leaves, palm sugar and sugar to a boil. Simmer gently, covered, for 5 minutes. Turn off heat. Discard pandan leaves.
250 ml water, 4 young pandan leaves, 50 g dark brown palm sugar, 40 g sugar
Whilst simmering, whisk tapioca starch, rice flour, orange lye and 160 ml water till smooth.
45 g tapioca starch, 45 g rice flour, ⅓ tsp orange lye, 160 ml water
Pour batter into sugar solution. Add black treacle or brown food colouring. Whisk till smooth. Turn on heat, very low. Whisk vigorously. Once whisk feels heavy, turn off heat immediately. Keep whisking vigorously till residual heat dissipates. Batter should now be just thick enough to form thick ribbons when whisk is lifted. If not, turn on heat again and whisk as before.
½ tbsp black treacle
Scrape batter into 15 x 15 x 5 cm cake pan lined with parchment paper. Wet spatula and smooth top of batter. Steam 10 minutes over low heat. Remove from steamer. Leave till cool.
Sprinkle grated coconut with salt. Mix evenly. Place pandan leaves in middle of coconut. Steam 10 minutes over high heat. Discard pandan leaves. Remove from steamer. Leave till cool.
100 g grated fresh coconut, ⅛ tsp salt, 4 young pandan leaves
Cut kueh into 25 pieces with scissors. Dredge in grated coconut till thoroughly coated. Serve as snack or dessert, sprinkled generously with grated coconut.