4 oz. Club Soda - (more)
2 1/2 oz. Gin - (more)
1 1/2 oz. Lemon Juice - (more)
1 tsp. Superfine Sugar - (more)
1/2 oz. Creme de Cassis - (more)
In a shaker half-filled with ice cubes, combine the gin, lemon juice, and sugar. Shake well. Strain into a collins glass almost filled with ice cubes. Add the Club Soda. Stir well. Drop the cassis into the centre of the drink.