Put the coffee, sugar and 2 tbsp of the hot water in a medium bowl and beat on medium for a full two minutes. The sugar will start to dissolve and the mixture will become much lighter
Add a tbsp more of water, whip on medium high for another minute, then add the water in 1 tbsp increments, whipping for 30 seconds after each until your water is used up/ The mixture will look like a luxurious coffee mousse
Beat for another minute for additional volume.
To make the coffee add a generous dollop into a mug, add boiling water and milk as per taste. Mix a little and enjoy. Adjust per taste, adding coffee, sugar or milk as needed.
To make this coffee prettier you can scatter some coffee granules over the top, swirling with a toothpick. This mix makes enough for 4-6 large mugs, but can easily be doubled.