Pour all ingredients into a cocktail shaker except the Crème de Mûre. Shake well with ice until thoroughly chilled. Strain the mixture into a chilled old fashioned glass filled with crushed ice. Finally, pour the blackberry liqueur (Crème de Mûre) over the top of the drink in a circular motion.
My Bar Shelf reads your shelf and shows you every cocktail you can make from what you already own, including Bramble.