In a sauce pot, bring 3 cups of the water to a boil. Add instant coffee and sugar. Stir until dissolved.
In a large bowl, sprinkle the gelatin on the remaining 1 cup of cold water. Let stand for about 1 minute or until gelatin powder begins to bloom.
Gradually add the 3 cups of boiling coffee and stir constantly for about 2 to 3 minutes or until gelatin is completely dissolved and no granules are visible.
Transfer mixture into a baking dish and allow to completely cool. Refrigerate for about 2 to 3 hours or until completely set.
In a bowl, combine 2 cup milk,1/2 tsp coffee powder, condensed milk and fresh cream. Stir until blended.
Cut set gelatin into 1-inch cubes and divide into serving cups. Top with sweetened cream. Garnish with whipped cream, if desired.
Serve cold.
