Ingredients: Served: On the rocks: poured over ice. Drinkware: Old Fashioned Glass. Method: Pour all ingredients into a cocktail shaker except the Crème de Mûre, shake well with ice, strain into chilled old fashioned glass filled with crushed ice, then pour the blackberry liqueur (Crème de Mûre) over the top of the drink, in a circular motion. 50 ml Gin, 25 ml Fresh Lemon Juice, 12.5 ml Sugar Syrup, 15 ml Crème de Mûre