What component is added to the tall double shot on ice after shaking for 10 seconds?

The correct answer is a splash of milk. In the preparation of the tall double shot on ice, after shaking the espresso with ice for 10 seconds to chill and dilute it slightly, the addition of milk creates a smooth texture and balances the robust flavor of the espresso. This process enhances the drink's overall flavor profile, making it more appealing to those who prefer a creamier, softer beverage.

While cream, water, and syrup are all potential additions in various drinks, they are not the standard components added following the shaking process for a tall double shot on ice. Cream might result in a richer taste, but it's not the usual step in this particular drink's preparation. Water could dilute the flavor further without adding any creaminess, and syrup would sweeten the drink but not provide the smooth mouthfeel that milk delivers. Thus, the use of milk is integral to achieving the desired consistency and flavor balance for this specific drink.