Add water in a medium saucepan. Sprinkle the gelatin powder over the water and stir to dissolve. Add 2 tablespoons instant coffee powder and stir. Continuously stir the mixture over medium heat until it comes to a boil. Turn off 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. Once the gelatin has set, cut it into small cubes and set aside in a container.
Dissolve 1 tablespoon instant coffee powder in 2 tablespoons hot water. In a deep container (a beverage jar is ideal), mix together the cream, the coffee mixture, and the condensed milk. Stir thoroughly. Add the jelly cubes. Chill until ready to serve.
Optional: Top each serving with whipped cream.
You may use other brands of gelatin ( like Knox Unflavored.) Just make sure to follow package directions and use the appropriate amount of the product to set 6 cups of liquid.