What is recommended to do with the demitasse cup before pulling an espresso shot?

Pre-warming the demitasse cup before pulling an espresso shot is crucial for several reasons. First, espresso is a delicate beverage that is sensitive to temperature changes. When the cup is cold, it can cause the temperature of the espresso to drop rapidly upon contact, which adversely affects its flavor and crema. The crema is the golden layer on top of the espresso, and maintaining optimal temperature is essential to preserve its quality and texture.

By pre-warming the cup, you ensure it is at a temperature that helps retain the heat of the freshly brewed espresso. This step is typically done by running hot water through the cup or placing it on top of the espresso machine while it’s heating up. This practice enhances the overall experience of drinking espresso, allowing the drinker to enjoy the full aromatic and flavor profile without losing desirable nuances.

While rinsing the cup with cold water, drying it completely, or filling it with hot water might seem appealing, these actions do not contribute to maintaining the optimal drinking temperature for the espresso. Instead, they could lead to unfavorable changes in the espresso's characteristics, which is why pre-warming is the best practice.