Add your instant coffee, gelatin powder, brown sugar and boiling water into a large jug. Whisk everything until the sugar has dissolved, and make sure there's no gelatin stuck to the bottom!
⅓ cup brown sugar, 3 tsp gelatin powder, 2 tbsp instant coffee, 1 cup boiling water
Pour in the cold water and whisk again.
1 cup cold water
Pour in the coffee jelly into either dessert cups or glass dish.
Optional: Using your whisk, try to break any large bubbles around the edges to give the jelly a nice smooth finish once set.
Place into the fridge for at least 3 hours to set. (It will still be warm, but the cold water brings the temperature down enough to pop it straight in the fridge.)
If using a dish, cut jelly into cubes and scoop out into serving dishes.
When serving, add any optional garnishes (such as cream, mint, chocolate shavings, coffee beans, maraschino cherries or condensed milk) straight on top of the jelly and eat!
thickened cream / heavy cream, chocolate shavings, coffee beans, fresh mint leaves, cocoa powder, maraschino or glacé cherries