Start by filling a large jar or beverage container with cool water.
Now add your tea bags- the rule is usually about 1 cup of water to every regular size tea bag. I used jumbo iced tea bags and those are equal to 2 regular bags.
Add a lid to your jar and set outside in a sunny spot for 1-2 hours. Don't leave it longer than 2 hours or it may become bitter.
Once your tea is brewed bring back inside and discard tea bags.
Puree 1 cup of blackberries in a blender or food processor.
Stir blackberry puree into tea and add sugar to taste. I added 1/2 cup.
Pour into glasses filled with ice and garnish with blackberries.