(1/4-ounce) package unflavored gelatin
4 tablespoon sugar
3 tablespoons cold water
2 cups fresh brewed espresso coffee
In a small saucepan, combine gelatin, sugar, and cold water. Add 1 cup of the coffee and boil over high heat. Stir until the gelatin and sugar have dissolved. Pour the mixture into a small bowl with remaining coffee, cover with plastic wrap, and chill in the refrigerator until solidified about 6 hours.