Add water to a medium saucepan. Sprinkle the gelatin powder over the water and stir to dissolve. Add 2 tablespoons of instant coffee powder and 1/2 cup of sugar and stir. Continuously stir the mixture over medium heat until it comes to almost a boil. Turn off the heat.
Pour mixture into a 9 x 13 baking dish. Allow it to cool and set completely. To fasten things up, put the baking dish in the fridge. This will take 1-3 hours. Once the gelatin has set, cut it into small cubes.
Dissolve 2 tablespoons of instant coffee powder in 3 tablespoons of hot water. In a deep container (a beverage jar is ideal), or a bowl, add the jelly cubes. Pour the cream, the coffee mixture, water and the condensed milk. Stir gently but thoroughly. Chill until ready to serve.
Optional: Top each serving with whipped cream.
Video
Notes
If using Knox gelatin, use 4 sachets which is equal to 4 tablespoons, and use 4 cups of water.
You can also make the coffee cream to be stronger in flavor by adding more coffee granules. Dissolve the coffee granules in hot water first before adding it to the rest of the mixture.