In a large bowl, sprinkle the gelatin over the coffee liqueur; let stand until the gelatin is softened, about 5 minutes. Once the gelatin is softened, add hot coffee, sugar, and salt; stir the mixture until the gelatin is completely dissolved and the mixture is clear.
Pour the coffee liquid into either eight (8) individual jello molds, custard cups, dessert glasses, or coffee cups. Refrigerate until the jellies are firm
When ready to serve, remove from refrigerator. If poured into jello molds, unmold before serving. Add some sweetened whipped cream to the top of each jelly and serve.
Makes 8 servings.