
Pineapple juice is the sweet, acidic juice pressed from the flesh of the pineapple fruit (Ananas comosus).
A pronounced tropical pineapple aroma leads into a sweet, moderately acidic body with a medium, mouth-filling weight.
Shaken hard with the build, it contributes body and a characteristic froth along with sweetness, soft acidity and a high tropical aroma; it works both as a bulk base juice and as a smaller aromatic accent. Purchased versions are often sweetened or diluted, so fresh juice gives a sharper, more aromatic result.
Poorly substitutable when pineapple is the defining flavour, since its specific tropical aroma cannot be reproduced from other juices or from sweetener and acid; as a small accent the loss is tolerable, with sugar syrup rebalancing sweetness and citrus or other fruit acid adjusting acidity, though the softer profile differs from sharp citrus.
Producers press or extract the liquid from the edible flesh of ripe pineapples, yielding a juice that carries the fruit's sugars and acids. Fresh, unpasteurised juice retains bromelain, a proteolytic enzyme naturally present in the fruit, which makes it behave differently from canned or heat-treated juice in some preparations.
Fresh juice loses aroma and acidity quickly and its enzyme activity fades; refrigerate and use within a day or two of pressing.