Begin by pouring 4 cups of milk into a blender or mixing container. Add 5 teaspoons of unsweetened cocoa powder and 5 teaspoons of sugar to the milk. Blend or whisk the mixture thoroughly until the cocoa powder and sugar are completely dissolved and the mixture is smooth and well combined. This step guarantees you won't have any gritty texture in your final drink and allows the chocolate flavor to distribute evenly throughout the milk base.
Fill a tall glass with chipped ice, packing it about three-quarters of the way to the top. Pour the prepared cocoa-milk mixture over the ice, stirring gently to combine and chill the drink. The ice will begin to melt slightly, integrating with the mixture and creating the perfect cold, creamy texture.
Top your finished iced chai tea latte generously with whipped cream for an indulgent finishing touch. The whipped cream not only adds richness but also provides a pleasant textural contrast to the cold, smooth drink beneath it. Serve immediately with a straw and spoon, allowing you to enjoy both the creamy mixture and the whipped cream topping together.