AMARETTO SOUR

1970s American bars.

ROCKS GLASS
ETHANOL 17 G118 KCAL FROM ETHANOL4.8 OZ SERVED

SPEC

1½ oz · 45 mlAMARETTO28 %
¾ oz · 22 mlBOURBON40 %
1 oz · 30 mlLEMON JUICE
¼ oz · 8 mlSIMPLE SYRUP
½ oz · 15 mlEGG WHITE

1 oz taken as 30 ml in the metric column.

METHOD

  1. 01DRY-SHAKE WITHOUT ICE
  2. 02ADD ICE + SHAKE HARD
  3. 03STRAIN INTO ROCKS GLASS
  4. 04GARNISH WITH ANGOSTURA + CHERRY

1 oz taken as 30 ml in the metric column.

STRENGTH // WORKED

Pre-batch4 oz mixed with ice, 0.72 oz of it pure alcohol
MeltShaken: +20 % of the pre-batch, +0.8 oz of water
Served4 + 0.8 = 4.8 oz in the glass
Strength0.72 ÷ 4.8 = 15.0 % ABV as served
Ethanol0.72 oz × 29.57 ml × 0.789 g/ml = 17 g · about 118 kcal from the alcohol alone

IN THE GLASS

VANILLIN

FROM BOURBON · from oak barrel aging

Formula
C₈H₈O₃
Mass
152.15 g/mol
IUPAC
4-hydroxy-3-methoxybenzaldehyde

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.

CITRAL

FROM LEMON · the lemon aroma

Formula
C₁₀H₁₆O
Mass
152.24 g/mol
IUPAC
(2E)-3,7-dimethylocta-2,6-dienal

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.

CHEMISTRY

Amaretto, bourbon, lemon, sugar and egg white. Amaretto's almond benzaldehyde note sits over vanillin from the bourbon, anchored by citral from the lemon. The sweetness masks the proof, and the egg white rounds the edges.

PROVENANCE

Disaronno-and-sour-mix in its 1970s form was a bar-disaster cocktail. Jeffrey Morgenthaler's 2012 reframing (cask-proof bourbon to add backbone, fresh lemon, simple syrup, and an egg-white shake) became the canonical modern spec and rescued the drink from the cloying-sweet bin.

AMARO & LIQUEUR // NEARBY