Many people believe that green tea can only be brewed with hot water, but this is not the case. Green tea can actually be brewed with cold water, although the process takes a bit longer. Cold-brewed green tea has a mellower taste than its hot-brewed counterpart, and it is also less likely to cause stomach upset.
To brew green tea with cold water, simply place the tea leaves in a pitcher of cold water and allow them to steep for several hours. The resulting tea can be enjoyed over ice or stored in the fridge for future use. Brewing green tea with cold water may take a bit more time, but it is worth the effort for those who prefer a milder-tasting cup of tea.