By muddling the blackberries with rosemary this refreshing cocktail gets a full-bodied flavor punch. Mixed with sour mix, tequila and topped off with fizzy sparkling wine, you'll definitely want to make a large batch of this blackberry cocktail recipe.
Muddle the rosemary and berries well in a cocktail shaker. Add the sour mix, tequila and ice. Shake until well-chilled. Strain into a small Champagne flute. Top with brut Champagne or sparkling wine. Garnish with the remaining blackberry.