
Fresh pineapple juice is the sweet, acidic juice pressed from fresh pineapple flesh.
Besides sweetness and acidity, it does what few juices do: it shakes up into a thick foam head, as on a French Martini. Raw juice still carries active bromelain, so it slowly breaks down dairy and gelatin in a mix left standing.
Fresh pineapple
Best blended and strained.
Bottled pineapple juice
With no added sugar, it swaps in at the same measure and about the same sweetness. It foams a little less and smells flatter.
Too sweet for a straight swap. Use it in place of any syrup, and make up the volume with water and a little lime.
A day or two chilled. It separates as it stands and wants a stir before measuring, and it ferments faster than most juices, so a faint cider smell means it has started.
Mary Pickford
White rum