Café Royal Cocktail Book by W. J. Tarling (1937, p.160)
| 1 dash | Angostura bitters | base |
| 0.5 part | Calvados | base |
| 0.5 part | caperitif — Caperitif | other |
- Mix and strain into a cocktail glass.
Oom Paul is Caperitif and calvados with Angostura bitters.
Café Royal Cocktail Book by W. J. Tarling (1937, p.160)
| 1 dash | Angostura bitters | base |
| 0.5 part | Calvados | base |
| 0.5 part | caperitif — Caperitif | other |