Built in the glass: +5 % of the pre-batch, +0.3 oz of water
Served
6 + 0.3 = 6.3 oz in the glass
Strength
0.75 ÷ 6.3 = 11.9 % ABV as served
Ethanol
0.75 oz × 29.57 ml × 0.789 g/ml = 18 g · about 123 kcal from the alcohol alone
IN THE GLASS
FURFURAL
FROM VODKA GRAIN TRACE · the toasted/caramel note
Formula
C₅H₄O₂
Mass
96.08 g/mol
IUPAC
furan-2-carbaldehyde
The toasted-almond / caramel note in aged port, madeira, and amontillado sherry, formed when sugars in the wine slowly oxidize during long oxidative cask aging. Also in roasted coffee, baked bread, and any food that's been browned through Maillard chemistry. The deeper the toast on a bourbon barrel, the more furfural extracts into the spirit; the longer the madeira sits in the estufa, the more accumulates.
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.
The anise compound that defines absinthe, ouzo, sambuca, and pastis. Hydrophobic: with water in the glass it falls out of solution and clouds the drink. That cloud is called the "louche" and it's not a metaphor or a mood. It's a physical phase transition, visible as it happens.
Vodka, orange juice and a Galliano float. It is the Screwdriver with a vanilla-anise top: Galliano's vanillin and the trans-anethole of star anise float above the orange juice's d-limonene. Galliano infiltrates down through the middle of the glass, making every sip slightly different.
PROVENANCE
Largely a marketing invention: the Galliano importer, McKesson, built a 1969 campaign around the drink (and may have commissioned the recipe) to push Galliano sales in the American market. The mascot 'Harvey,' a surfer who supposedly invented the drink after a competition loss in Manhattan Beach, was a Galliano marketing fiction. The drink was ubiquitous through the 1970s and faded with disco. Modern bartenders rate it kitsch but it's a faithful three-ingredient highball that works.
