If you drink too many of these, you'll probably see pink elephants, but you'll have a pleasant journey.
For every jigger of gin, shake 1-5 drops of bitters into a shaker with clean ice. Shake briefly or stir, and strain out into a cocktail glass.
Some recipes for a pink gin only require that the final glass be rinsed with bitters, but I prefer to have the flavors mingled more completely.
*My favorite for a Pink Gin is Hendricks Gin. It melds perfectly with the bitters to leave a very faint, almost cinnamon aftertaste.