The Artistry of Mixing Drinks by Frank Meier (1936, p.39)
| 0.5 part | gin — Gin | base |
| 0.25 part | passion fruit juice — Passion Fruit Juice | base |
| 0.25 part | Grand Marnier | modifier |
- Shake well and serve.
Royal Romance mixes gin with passion fruit juice and Grand Marnier.
The Artistry of Mixing Drinks by Frank Meier (1936, p.39)
| 0.5 part | gin — Gin | base |
| 0.25 part | passion fruit juice — Passion Fruit Juice | base |
| 0.25 part | Grand Marnier | modifier |
Café Royal Cocktail Book by W. J. Tarling (1937, p.183)
| 0.5 part | gin — Booth's Dry Gin | base |
| 0.25 part | passion fruit juice — Dry Passion Fruit Juice | dilution |
| 0.25 part | Grand Marnier | modifier |
| 1 dash | Grenadine — Grenadine | sweetener |
By J. Perosino; 1st Prize British Empire Cocktail Competition, London, 1934.