Limes are called for in many recipes including key lime pie, tacos, margaritas and much more. But you may have come across a recipe that calls for Key limes as opposed to limes and wondered what that means.
There are two main types of limes you’ll come across in a grocery store, the Persian lime and the Key lime. A Persian lime is often labeled “limes” and has origins to present-day Iran. Key limes on the other hand are native to Southeast Asia.
The most noticeable difference between these two limes is size. A Persian lime is a medium size, around 2 to 3 inches, and oblong. A Key lime, which is also known as a Mexican lime, is much smaller and rounder. Key limes also contain seeds while Persian limes do not.
These two also differ when it comes to taste. Persian limes are more acidic than Key limes, giving them a more tart flavor. Key limes are known for being aromatic and typically sweeter in taste, making them perfect for a refreshing pie. Persian limes can still be used as a substitute for many lime dishes. If you find yourself out of Key limes but still want the aroma, try bottled Key lime juice.
Source: the Kitchn