In a blender, add 1 cup of cold milk, 2 tablespoons of instant coffee powder, 3 tablespoons of sugar, and 6-8 ice cubes.
Blend the mixture until it becomes frothy and smooth.
Pour the frappe into a tall glass and top it with a dollop of whipped cream, if desired.
Garnish with a sprinkle of cocoa powder or chocolate shavings and serve immediately with a straw.