Pineapple syrup is a thick, sweet syrup made from pineapple juice. It often contains gum arabic, which gives the syrup a richer body and silkier mouthfeel than other syrups.
It’s easy to make your own pineapple syrup. Blend up 1 cup (or about 240 mL) simple syrup with 8 oz (or about 120 mL) of chopped fresh pineapple, plus 3/4 oz (or about 7.5 mL) vodka or white rum. Blend until smooth, then filter through a wire mesh strainer into a jar or bottle. Refrigerate for up to two weeks.