Final answer:
A regular signature espresso offers a concentrated, bold, and robust taste with a creamy mouthfeel, having notes of chocolate, nuts, and fruit, without the added sweetness of whipped cream or powdered sugar.
Step-by-step explanation:
The taste of a regular signature espresso can be described as a concentrated beverage with a rich, bold, and robust flavor profile. Being a stronger coffee than a Starbuck's Grande Coffee or a plain brewed coffee, an espresso boasts a balance of slight acidity and a hint of bitterness, often accompanied by a creamy mouthfeel due to the presence of crema on top. Espresso typically has nuanced flavors which can include notes of chocolate, nuts, and fruit, depending on the coffee bean used and the roasting process. Unlike the added whipped cream and powdered sugar that come with a Viennese specialty coffee, the signature espresso stands on its own with its intense coffee essence.