First make a simple syrup by combining 1 cup sugar and water in a saucepan over medium heat, stirring until the mixture boils.

Lower the heat and allow the syrup to simmer for another minute.

Remove from heat and let cool. In a blender or food processor, puree the blueberries with 2 tablespoons of sugar.

In a pitcher, combine the cooled syrup, lemon juice and blueberry puree.

To serve, pour 1/4 to 1/3 cup of base into a glass and fill with water.

Makes base for 12 servings.