Bring coconut milk and pandanus leaves to a light boil, simmer for 5 minutes, cool to room temperature

Meanwhile, mix flours, starch and sugar in a bowl

Once coconut milk is cooled, pour into flour mixture and stir to combine and no lumps

Divide batter into 3, add pastes to the other two and leave the 3rd as is

Preheat steamer, brush mold lightly with vegetable oil

Once steamer is ready, pour some of the white batter, steam for 5 minutes, followed with other batter, alternating colors each time, and steam 5 minutes each time.

To avoid steam water drips onto cake, cover the pan with clean tea towel, then top with pan lid

Once all batter used up, steam the whole cake for 25 minutes

Cool completely before slicing