In a blender or food processor add the Yogurt, Milk, and Water blend for 30 secs. Open the blender and the mixture appears frothy now. To this add in the Rose syrup, Gulkand (if using), and Sugar.
Once again blend it for about a min or till your lassi looks frothy. Serve chilled by topping with ice cubes as by topping with nuts.
Notes
You can also add few rose petals while preparing the lassi.
Just before serving the lassi you can add ice cubes.
Can be served as an after meal drink on a hot sunny day.