what is the optimal temperature of water for a good espresso cup and how long should I let the water sit before stirring and pressing – From Wini W.

More than a dozen subjects, ranging from coffee professionals to every day coffee drinkers chose 175F (80C) as the water temperature which yielded the best flavor. The short steep time resulting from ten seconds' stirring also contributed to the best flavor. Since the original testing, we've found that a stirring time of a minute when brewing with room temperature tap water yields excellent flavor.