September 5, 2015 Brian Petro 100 Days of Cocktails, Bourbon, Rye, Cocktails, Cocktail History, Whiskey #100DaysOfCocktails - Day 3 - The Manhattan September 5, 2015 Brian Petro 100 Days of Cocktails, Bourbon, Rye, Cocktails, Cocktail History, Whiskey When you start tracing backwards, every cocktail that blended vermouth and a spirit come from one common source. The Manhattan stands at the top of the cocktail hill.