1 1/2 c. water
1 1/2 c. sugar
3 sprigs fresh rosemary
1 1/2 c. lemon juice
To make the syrup, boil the water and the sugar in a large pot; boil for 5 minutes. Turn off the heat; add lemon juice and rosemary. Cover and let it sit for 20 minutes. Remove rosemary, then cool in the fridge overnight.
To make the lemonade, add 1 part syrup to 2 parts cold water to make the lemonade.