3.17 oz mixed with ice, 0.95 oz of it pure alcohol
Melt
Shaken: +20 % of the pre-batch, +0.63 oz of water
Served
3.17 + 0.63 = 3.8 oz in the glass
Strength
0.95 ÷ 3.8 = 25.1 % ABV as served
Ethanol
0.95 oz × 29.57 ml × 0.789 g/ml = 22 g · about 156 kcal from the alcohol alone
IN THE GLASS
DIACETYL
FROM WHITE RUM CANE · the butter note
Formula
C₄H₆O₂
Mass
86.09 g/mol
IUPAC
butane-2,3-dione
The butter note. Wanted in oak-aged Chardonnay and certain ales (English bitter, Czech pilsner) where a controlled amount adds body; unwanted at high concentrations, where it slides into movie-theater-popcorn territory. Yeast produces it as an intermediate during fermentation and reabsorbs it during conditioning. A rushed beer that skipped its conditioning rest often carries diacetyl as an off-flavor the brewer didn't intend.
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.
White rum, Cointreau, lime and maraschino. It is the Daiquiri's bigger cousin: Cointreau replaces sugar for depth, and maraschino adds benzaldehyde-forward cherry. D-limonene comes from the Cointreau, citral from the lime and ethyl esters from the rum.
PROVENANCE
Usually credited to Don the Beachcomber and named for the bar, though Trader Vic's may have made it first: a lower-complexity tiki drink, only four ingredients, no proprietary mixes. The combination of triple-sec (Cointreau) with maraschino is unusual; both are colorless fruit liqueurs, one orange and one cherry, that on paper would overlap, but in practice the cherry-pit benzaldehyde reads distinctly from the bitter-orange D-limonene.
