Steam the half and half: Steam the half and half with an espresso machine (stretching the milk to 20 to 25% in height), or froth the half and half with a frother, French press or whisk. Use ½ cup milk for this process: discard the leftovers or make two drinks.
Serve: Pour 2 ounces espresso into a small glass, then top with the steamed half and half. Drink immediately.