01 - Place instant coffee, granulated sugar, and hot water in a medium mixing bowl.
02 - Whip the mixture vigorously using a hand whisk or electric mixer for 3 to 5 minutes until thickened with soft peaks.
03 - Fill two glasses with ice cubes if desired and pour in the milk, leaving space at the top for the whipped mixture.
04 - Distribute the whipped coffee mixture evenly over the milk in each glass.
05 - Gently swirl with a spoon or straw before enjoying, if preferred.