A dry Manhattan-like cocktail with zesty citrus. Some will object to the scummy head caused by shaking rather than stirring but a Deshler must be shaken
Having tried this two days ago, I wanted to do a back to back comparison using the PDT recipe: 1.5oz rye, only 1 oz Dubonnet, and more Cointreau .25 oz. And it is stirred, not shaken. I preferred this with less Dubonnet but it misses something by not being shaken as per the original recipe. And I don't just mean the "scummy head". Lost is some aroma, complexity, bitterness, and probably mouthfeel the Regal Shake purportedly can impart.