A photo like it (a freddo cappuccino in Greece) · Andy Li (CC0) via Wikimedia Commons · source
Greece's summer-long coffee, and the reason Athens' cafés are full at noon: a double espresso shaken hard with ice until it's cold and frothy, poured over fresh ice; add cold milk foam on top for a freddo cappuccino.
Sugar to taste, added to the hot shot: sketos (none), metrios (medium, 1 tsp), glykos (sweet, 2 tsp)
Ice: a handful for shaking, plus a glass full
For a freddo cappuccino: 60 ml (1/4 cup) very cold low-fat or skim milk
How to make it
Shot (30 sec): Pull the double espresso into a cocktail shaker or metal cup, with the sugar if you want it, and stir to dissolve.
Shake (15 sec): Add 3 or 4 ice cubes and shake hard (or blend with a milk frother or stick blender for 10 seconds) until the coffee is cold and has a thick, pale foam.
Pour (10 sec): Fill a tall glass with fresh ice and strain the coffee over it.
Freddo cappuccino (30 sec): Froth the cold milk with a milk frother or in a sealed jar shaken hard for 30 seconds, until thick, and spoon it on top of the freddo espresso.
Serve: With a straw and a glass of water. It's made to last an hour of talking.
Tips
Sugar only dissolves in the hot shot, so decide before you shake.
Skim milk makes the thickest cold foam, which is why Greek cafés use it.
The older Greek iced coffee is the frappé: instant coffee, sugar and a little water shaken to a foam, topped with cold water and ice.