Damson Plum Liqueur, Dry Vermouth, ice and lemon. All you need...
60ml Damson Plum Liqueur (Gin based liqueur)
30ml Martini Dry Vermouth
Place a cocktail glass in the freezer to chill. Combine the gin and vermouth in a shaker, fill it halfway with ice, and shake vigorously until well chilled, about 20 seconds. Strain into the chilled glass. Garnish with a twist of lemon. (Be sure to run the slice of lemon over the glass’s rim.)