01 - Combine instant coffee, granulated sugar, unsweetened cocoa powder, and hot water in a medium mixing bowl. Whisk vigorously by hand or use an electric mixer for 2 to 4 minutes until the mixture becomes thick, glossy, and airy.
02 - Divide ice cubes evenly between two tall glasses. Drizzle 1 tablespoon chocolate syrup into each glass for a rich base flavor.
03 - Pour 1/2 cup cold whole milk or plant-based milk into each glass over the ice and syrup.
04 - Spoon the whipped mocha coffee mixture evenly atop the milk in each glass, creating a cloud-like layer.
05 - Drizzle additional chocolate syrup over the whipped coffee, if desired, for added indulgence.
06 - Stir the beverage thoroughly before drinking to blend flavors and achieve a creamy, chocolatey iced coffee.