As usual with classic old cocktails the origin is unclear. Most likely, the Manhattan was one of the five borough cocktails (Brooklyn, Bronx, Manhattan, Queen's and the Staten Island cocktail) made to represent the parts of New York city.
50 Gram, crush
1 Medium (Cognac infused cherry)
1. Fill a glass with crushed ice.
2. Add the rye, sweet vermouth and angostura bitters and stir well.
3. Garnish with a cognac infused cherry and serve chilled.