Drain and rinse grass jelly, cut into small cubes
In a serving jug, per serving (again, as strong as you like, as sweet as you want):
Place enough grass jelly, then adding 1-2 tbsp sweetened condensed milk. Pour in at least 2 caps of mocha syrup, followed with 1/4 c milk more or so, then enough water, stir. If you like to, add more milk than water or whole milk and no water
Add in ice cubes, stir again, and serve immediately