Add wine and blackberries to a container. Muddle the berries. Cover with a clothe and leave for 48 hours. Strain liquid and add to a pot over medium heat. Add sugar and simmer for 10-15 minutes. Remove from heat, add vodka and cool.
Cocktail
Add all ingredients to a shaker and shake. Pour into a coupe glass. Garnish with a BlackBerry and a rosemary sprig.