1/2cupMulberry syrup, or more to taste (see notes for using fresh Mulberries instead). Click link for the mulberry syrup recipe.
Boil 4 cups water. Steep the green tea in a heat-safe bottle or bowl. Optional: Add a few mint leaves to the tea as it steeps, or add a squeeze of lemon or lime juice. Add mulberry syrup, to taste, and stir. Chill, and serve over ice.
If you want to use fresh mulberries (or blackberries, or blueberries), just add 1 cup of fresh berries to a food processor and process for a few seconds until all the berries are broken up. Pass the berry mixture through a fine sieve, collecting the strained juice. Use a spoon to stir the pulp in the sieve and get all the juice out. Add the fresh juice to the steeped iced tea, and add sugar to taste (about 4-8 tablespoons for 4 cups of iced tea).