Add enough water just to cover the coffee and sugar.
Using a frother, mix the coffee-sugar mixture until a thick foam is created (it should only take a few seconds) (note 1)
Add the ice cubes.
Top with a cup of water.
Serve the frappe with a straw. Sip slowly and enjoy.
Recipe Notes
Note 1: You can also make this without a frother by using a shaker bottle or even a simple jar with a lid. Just add the coffee, sugar, and enough water to cover the coffee and sugar. Put the lid on and shake the bottle/jar until a thick foam is created. It will take longer than using a frother but it will work!