In a small bowl, combine sugar and agar powder and whisk together.
Place the water in a saucepan and add the sugar mixture.
Heat the liquid until it begins to bubble over high heat.
Stir until completely dissolved.
Once boiling, turn down the heat to simmer.
Add instant coffee and stir until completely dissolved Remove from the heat and let cool for 5 minutes.
Scoop up any bubbles on the surface with a spoon and discard.
Pour mixture into the pan (or serving dishes) and let cool.
Cover and refrigerate for 1 hour or until set.
Using a knife, cut through the coffee jelly vertically and then horizontally to make cubes. You can cut them big or small cubes.
Serve & Enjoy!