What is the number of syrup pumps in a Trenta Shaken Espresso?

The number of syrup pumps in a Trenta Shaken Espresso is indeed one. This applies to Starbucks' guidelines for beverage customization, which specify that the Trenta size typically contains one pump of syrup for flavored drinks. This is consistent with maintaining the drink's balance of flavor without overwhelming the espresso. In the case of other sizes like Tall or Grande, more syrup pumps would be included, but the Trenta, being the largest size, serves a more diluted flavor profile. Knowing this helps ensure that customers receive their beverage just as they expect it, keeping their preferences and taste in mind.