If using your Kalko Frappe Machine, combine, in another glass the coffee, sugar and 1/4 cup cold water. Mix well using your frappe machine until you have created a thick froth. Alternatively, combine the coffee, sugar and water in a frappe shaker or jar, seal well and shake, shake, shake. You will magically create a thick froth. The longer and more enthusiastically that you shake, the thicker and more plentiful your froth will be.