The Sugar Free Opening Cocktail is another wonderful adaptation from the Savoy Cocktail Book. It is a wonderful blend between the blended whiskey and the herby notes of the sweet vermouth. The presence of the grenadine also helps accent this.
We’ve found a different combinations of this drink listed over on DrinksMixer.com, we see the ratio of Whiskey:Vermouth:Grenadine to be 3:1:1, whereas at the Savoy version is a 2:1:1. It really probably depends on just how much you tend to like whiskey, but I bet both are good.