Café Royal Cocktail Book by W. J. Tarling (1937, p.82)
| 0.33 part | Absinthe | base |
| 0.33 part | dry vermouth — Martini dry vermouth | base |
| 0.33 part | sweet vermouth — Martini sweet vermouth | modifier |
- Mix and strain.
Duchess is dry vermouth, sweet vermouth, and absinthe.
Café Royal Cocktail Book by W. J. Tarling (1937, p.82)
| 0.33 part | Absinthe | base |
| 0.33 part | dry vermouth — Martini dry vermouth | base |
| 0.33 part | sweet vermouth — Martini sweet vermouth | modifier |
See also: Duke