01 - In a medium mixing bowl, combine instant coffee, granulated sugar, and hot water.
02 - Vigorously whip the mixture using a hand mixer or whisk for 2 to 4 minutes until thick, creamy, and soft peaks form.
03 - Arrange two serving glasses with ice cubes if preferred, and pour 1 cup cold milk into each glass.
04 - Spoon the whipped coffee evenly onto the surface of each glass of milk.
05 - Swirl gently before drinking, or mix thoroughly for a smoother texture.