01DRY-SHAKE ALL INGREDIENTS (NO ICE) TO EMULSIFY EGG WHITE
02ADD ICE, SHAKE HARD A SECOND TIME
03DOUBLE-STRAIN INTO A CHILLED COUPE
1 oz taken as 30 ml in the metric column.
STRENGTH // WORKED
Pre-batch
3.25 oz mixed with ice, 0.9 oz of it pure alcohol
Melt
Shaken: +20 % of the pre-batch, +0.65 oz of water
Served
3.25 + 0.65 = 3.9 oz in the glass
Strength
0.9 ÷ 3.9 = 23.1 % ABV as served
Ethanol
0.9 oz × 29.57 ml × 0.789 g/ml = 21 g · about 147 kcal from the alcohol alone
IN THE GLASS
α-PINENE
FROM GIN
Formula
C₁₀H₁₆
Mass
136.24 g/mol
IUPAC
2,6,6-trimethylbicyclo[3.1.1]hept-2-ene
The pine note in juniper berries, and the reason gin tastes like a forest. Co-distilled with the spirit during production. Found in actual pine trees, rosemary, basil, and a good London Dry. The "Christmas tree" smell of gin and the smell of a forest floor share a single molecule.
An orange rind, squeezed, throws a spray that catches the light. That's d-limonene boiling off. It's roughly 95% of orange peel oil by mass, and the molecule that puts the "orange" in orange anything. Used industrially as a green solvent because the chemistry that dissolves citrus oils also dissolves greasy machinery. The expressed-peel garnish on a cocktail is delivering vaporized limonene to the rim of the glass.
Lemon's defining note: technically a mix of two geometric isomers (geranial and neral) that read as the same aroma to the nose. Lemon peel, lemongrass, lemon verbena, and Indian chai all carry it. In cocktails it's what a lemon twist contributes that lemon juice can't: the volatile expressed from the oil glands, not the acid from the pulp.
Gin, Cointreau, lemon and egg white. The dry shake denatures egg-white proteins into a stable foam cap that traps aromatic volatiles. Alpha-pinene from the gin and d-limonene from the Cointreau concentrate in the foam and release on the first sip. ABV is about 25%.
PROVENANCE
Harry MacElhone is credited with the modern White Lady at Harry's New York Bar in Paris in 1929, reworking his 1919 recipe from Ciro's Club in London, which used crème de menthe instead of gin. Harry Craddock printed the gin version in the 1930 Savoy Cocktail Book; the egg white came later, by the 1946 Stork Club Bar Book. Some accounts say it was named for Zelda Fitzgerald's platinum hair. The egg white isn't optional; without it the drink reads as a sharper, drier Sidecar variant.