Café Royal Cocktail Book by W. J. Tarling (1937, p.44)
| 0.13 part | lemon juice — fresh lemon juice | acid |
| 0.5 part | gin — Booth's Dry Gin | base |
| 0.25 part | curacao — blue curacao | modifier |
| 0.13 part | liqueur — creme of the sky | modifier |
- Shake.
Blue Skies is Booth's dry gin, blue curacao, creme of the sky, and lemon juice.
Café Royal Cocktail Book by W. J. Tarling (1937, p.44)
| 0.13 part | lemon juice — fresh lemon juice | acid |
| 0.5 part | gin — Booth's Dry Gin | base |
| 0.25 part | curacao — blue curacao | modifier |
| 0.13 part | liqueur — creme of the sky | modifier |
See also: Sky