Christie Lee's Cookbook, there's a recipe on how to make Coffee Jelly but it's not clear if the "1/2 cup instant coffee" is mix with water or just simply 1/2cup of instant coffee powder. For me, if it's powder for 2 1/2 cups water, that's too strong. What I did, I just added 4 tablespoon of coffee. I also used agar-agar replacing gelatin powder.
1/2 cup instant coffee (I used 4 tablespoon)
2 tablespoon gelatin powder (I used 1 small packet of agar-agar)
2 1/2 cups water
whipped cream (optional)
chocolate syrup (optional)
coffee creamier (optional)
fresh milk (optional)
Combine instant coffee, gelatin powder, sugar and water in a saucepan. Let boil over medium heat, stirring occasionally until completely dissolved. Transfer mixture into cups or small dessert bowls. Chill for 1-2 hours. Top jelly with some whipped cream and drizzle with chocolate sauce just before serving.
I just added coffee creamier like this photo below, and I cut some into cubes and added to cold fresh milk.