What is the standard brewing temperature for espresso at Black Rock Coffee Bar?

The standard brewing temperature for espresso at Black Rock Coffee Bar is typically established between 195°F to 205°F. This temperature range is optimal because it allows for the extraction of the coffee's flavors and oils without over-extracting and causing bitterness. Brewing espresso at too low a temperature can result in under-extraction, producing sour or weak flavors, while too high a temperature can lead to over-extraction, making the espresso taste harsh or burnt. Therefore, the choice of 195°F to 205°F strikes a balance that maximizes the quality and flavor profile of the espresso, making it the correct answer in this context.