
Pink gin names two things: the classic cocktail of gin with a dash of aromatic bitters, and a modern bottled gin flavored and colored with berry or fruit.
Two different things share the name, and the first question is which one the recipe means — the bottled pink style is colored and sweetened, the classic is gin with bitters and nothing else. For the bottle, 5 ml of a berry liqueur per drink is the practical rebuild.
Classic pink gin cocktail (gin + Angostura bitters)
Not a bottle but a cocktail: plain gin with a dash of Angostura at service. If the recipe asks for pink gin and you pour the bottled kind, the drink comes out sweeter and fruitier and loses the bitter spine — put it back with a couple of dashes.
Juniper leads, there is no fruit and no sugar, and it is bottled at 37.5% or more. The drink lands drier, stronger and without the pink — add a barspoon of berry syrup if that sweetness carries the recipe.