See below

Make one pot of coffee then discard the grounds. Add fresh grounds,
percolate again, with the COFFEE as liquid, NOT fresh water. Do this
three times. To the finished coffee mixture, add one half the amount
of sugar. Ex. ( If you make 2 cups of coffee in the end, add 1 cup of
sugar. ) Mix until sugar is completely dissolved.

Its use: Primarily it is stirred into cold milk, about 2-3
tablespoons per 10 ounce glass. Also, it is a popular ice cream
flavor which is used for making frappes. Here, milk shakes are
prepared without the ice cream, frappes with. Some even pour it OVER
ice cream.!