- Select 4 tumblers. In a saucepan over medium-low heat, combine the sugar and 1/2 cup water. Bring to a simmer, stirring to dissolve the sugar. Remove the sugar syrup from the heat and let cool.
- In a blender, combine 18 of the raspberries, the mint leaves and the sugar syrup and process until a smooth puree forms. Strain the puree through a fine-mesh sieve into a pitcher. You should have about 2/3 cup. Add 1 1/3 cups water.
- Fill the glasses with ice and divide the raspberry mixture among the glasses. Garnish with mint sprigs and the remaining raspberries speared on a cocktail pick. Serve immediately