Soak sugar in 1/2 liter of water and all other dry ingredients in 2 cups of water for at least 2 hours.
Grind all soaked ingredients (not sugar) to a very fine paste.
Mix remaining water to the paste and strain it using a strong muslin strainer to extract the liquid into a vessel until the residue becomes dry.
Add milk and sugar to the extracted liquid.
Mix the cardamom powder in the milk.
Chill for an hour of two before serving.
Makes about 8 glasses.