1 1⁄2 oz Drambuie
3⁄4 oz Scotch
3⁄4 oz Lemon juice
1 ds Bitters
1 ds Orange bitters
1 dr Orange flower water
Instructions
Shake, strain.
Notes
The original was an exercise in simplicity, a sour made simply of Drambuie and lemon, with optional bitters and orange flower water. The new version is a Rusty Nail Sour with flowery bells and orange whistles.