First you need to make coffee ice cubes. Pour the room temperature leftovers from your morning brew into an ice cube tray and freeze. I like to keep some in a zip-top bag in the freezer for a variety of uses.
These cubes are not only necessary for this blended drink but they are also fantastic for chilled coffee as these cubes don't dilute the coffee flavor. You could probably even make the cubes out of espresso if you want a really strong drink.