Brew 2 cups of strong coffee and let it cool slightly.
In a small saucepan, combine 1 cup of water and 1/4 cup of sugar over medium heat.
Stir until the sugar is fully dissolved.
Sprinkle 2 tablespoons of gelatin powder over the warm mixture and stir until completely dissolved.
Remove from heat and add the brewed coffee and 1 teaspoon of vanilla extract.
Mix well to combine all ingredients thoroughly.
Pour the mixture into a mold or individual serving cups.
Refrigerate for at least 4 hours or until fully set.
Once set, gently run a knife around the edges to loosen the jelly.
Top with whipped cream and chocolate shavings if desired.