Bring the water up to the boil, add the sugar and stir until its dissolved, allow to cool. Put the flour and tea powder into a large bowl, make a well in the center, add the milk and vanilla and then add the sugar water a little at a time, stir together to form a ball. It should be a smooth mix with no lumps. Use a cake tin or steamer lined with baking paper, place this into another larger pan and fill the outside with water to create a Bain Marie or water bath, cover with a lid and simmer or steam for 1 and a half hours. It will take less time if done in a steamer.
Turn out onto a plate and allow to cool before serving.
«Make sure you buy and use a glutinous rice flour for this dish as otherwise the texture will be to firm.»