
Pineapple cordial is a sweetened pineapple concentrate with added acid, which gives it a tart edge a plain syrup lacks.
Use it where a drink wants pineapple as well as sugar: tiki drinks with rum, coconut and citrus.
Pineapple syrup with lime
Grab a bottled syrup like Monin's and add a squeeze of lime per 100 ml. Taste and squeeze more if it feels flat.
Homemade cordial
Chop a small peeled pineapple and steep it in 800 g of sugar dissolved in 480 ml of water. Strain after 24 hours and sharpen with lime juice.
Plain pineapple syrup
It has practically no acid. Without the citrus boost, it lacks the sharp edge you need.
Rum infusions and liqueurs bring a kick of alcohol. You will need to balance them with extra lime and simple syrup.
Pineapple carries wild yeast, so the cordial can start fermenting in the bottle. Refrigerate it, use it within two weeks, and do not seal a warm batch tightly, since pressure builds.