Café Royal Cocktail Book by W. J. Tarling (1937, p.172)
| 0.33 part | creme de cacao — Crème de Cacao | base |
| 0.33 part | gin — dry gin | base |
| 0.33 part | cream — sweet cream | other |
- Mix and strain into a cocktail glass.
Princess Mary is crème de cacao, sweet cream, and dry gin.
Café Royal Cocktail Book by W. J. Tarling (1937, p.172)
| 0.33 part | creme de cacao — Crème de Cacao | base |
| 0.33 part | gin — dry gin | base |
| 0.33 part | cream — sweet cream | other |