Coffee Panna Cotta

Name: Coffee Panna Cotta
Cuisine: European, Italian, Mediterranean
Ingredients: 3 tablespoons (45 ml) cold water; 2 1/4 teaspoons (7 g/0.25 oz.) unflavored powdered gelatin; 1 cup (240 ml) heavy cream; 1/2 cup (120 ml) whole milk; 1/2 cup (120 ml) strong brewed coffee ((or 1 tablespoon coffee granules/powder dissolved in 1/2 cup water)); 1/4 cup (50g) granulated sugar; 1 teaspoon pure vanilla extract; 1/2 cup (120 ml) brewed coffee (or 1 teaspoon coffee granules/powder dissolved in 1/2 cup water); 1-2 tablespoons granulated sugar; 1 tablespoon Kahlua or another coffee liqueur, optional but so good!