*What is tamarind?
If you eat Thai food, you've definitely tried tamarind. Also used in Indian, Pakistani, Middle Eastern, Vietnamese, and all sorts of other national cuisines, tamarind is more popular than you might know. Those sweet, sour, brown candies that you get after Japanese food? That's tamarind. A hardwood tree that grows in most tropical regions—Africa, India, and Pakistan are all major producers—it's used in most of its forms (raw, ripened, powdered) in lots of international cooking. You can't sub unripened, green fruit for ripened fruit, as the taste is dramatically different. For most home uses, a block of pulp or a jar of paste is probably the best bet. As far as a substitute goes, lime juice is pretty good, but you can also go with a 50-50 mix of vinegar and sugar. If you've come across a few recipes calling for tamarind paste, you wouldn't go astray to seek some out. It's pretty delish.