How many pumps of vanilla syrup are required for a Venti Chocolate Cookie Crumble Frappuccino?

For a Venti Chocolate Cookie Crumble Frappuccino, the standard recipe calls for four pumps of vanilla syrup. This is because the Venti size drinks at Starbucks (which are 20 fl oz) generally require more syrup to ensure the flavor balance is maintained compared to smaller sizes. The vanilla syrup complements the rich chocolate and cookie crumble flavors, enhancing the overall taste of the beverage. Ensuring the correct number of pumps is crucial for achieving the intended flavor profile that customers expect.