Roughly blend pandan leaves with water in a mixer to extract the pandan juice.

Pour the pandan juice through a sieve cloth to filter. Discard the blended leaves and keep the filtered juice.

Add the filtered pandan juice to a pot and mix it with sugar. Place the pot over low heat, stirring occasionally. The syrup is done when the sugar is completely dissolved and the syrup has slightly thickened. If the pandan flavor feels a bit mild to your liking, you can always add a few knotted pandan leaves to the warm syrup to boost the aroma and flavor.