0.9 oz × 29.57 ml × 0.789 g/ml = 21 g · about 147 kcal from the alcohol alone
IN THE GLASS
CAFFEINE
FROM ESPRESSO · the alertness molecule
Formula
C₈H₁₀N₄O₂
Mass
194.19 g/mol
IUPAC
1,3,7-trimethylpurine-2,6-dione
A purine alkaloid that blocks adenosine receptors in the brain, so the tiredness signal never lands. Coffee, tea, cocoa, mate, guarana, kola: all unrelated plants, all evolved caffeine independently as an insecticide. Humans inherited a tolerance for what bugs can't handle.
Bourbon's fingerprint, extracted from the charred American oak the law requires for aging. Same molecule as the vanilla bean's signature, so a well-aged bourbon legitimately tastes like vanilla. Chemistry, not metaphor. Cognac, aged rum, tequila reposado all extract vanillin from oak too. Different barrels, same molecule.