Egg Sour

A rich and creamy take on the classic sour, with a whole egg adding velvety body to brandy and orange liqueur.

The Egg Sour is a Victorian-era elaboration on the sour format that enriches the standard three-ingredient structure of spirit, citrus, and sugar with a whole egg, producing a drink whose silky, foam-topped texture was considered the mark of quality service in American hotel bars and gentlemen's clubs of the 1870s through the 1910s. The technique of shaking cocktails with whole egg — yolk for richness, white for foam, both together for the most complete textural enrichment — was applied across the Fizz, Flip, and Sour categories in Victorian American bartending, and the resulting drinks were categorically different in mouthfeel from their non-egg counterparts. The yolk's fat emulsifies with the spirit's alcohol and the citrus's water, creating a homogeneous, creamy liquid rather than a simple mixture of separate elements. The white's proteins denature under the mechanical action of shaking, incorporating air into a foam that persists on the surface. The technique predates the modern dry-shake method — in which egg cocktails are shaken without ice first to emulsify the egg and then re-shaken with ice — by well over a century: Victorian bartenders simply shook everything together with ice, accepting the result as standard. The Brandy Egg Sour applies this Victorian technique to cognac, producing a drink that functions as a refined dessert cocktail while remaining structurally within the sour category.