Prepare the jelly by following the instructions on the box. I won’t pre-empt you with measurements since you might be using another brand or a bigger or smaller box of jelly. However, if the instructions say stir in some milk, skip that part. Just use water to which instant coffee has been added.
Note that if you’re using unflavored jelly, you will have to add enough sugar to taste.
When the jelly has been dissolved, pour the liquid into individual cups. Cool until set. For best results, chill the jelly.
To serve, top the jelly with a scoop of vanilla ice cream and sprinkle with cinnamon powder.
That’s it! You weren’t really expecting something more complicated than that, were you?