How many pumps of syrup are used in a Tall Shaken Espresso?

In a Tall Shaken Espresso, the appropriate number of pumps of syrup is one. This is based on the standard recipe used in Starbucks for this specific beverage size. The single pump provides enough sweetness to complement the espresso and other ingredients without overpowering the coffee's natural flavor.

The you may come across other options like two or three pumps, which would typically apply to larger beverage sizes or different drinks where a stronger sweet flavor profile is desired. Option zero would not be appropriate since it would result in a beverage lacking the intended flavor enhancement that syrup provides. Thus, one pump strikes a balance between sweetness and coffee characteristics, making it the correct choice.