I've often been asked if green tomatoes and tomatillos are the same thing and they're actually not! Green tomatoes are just unripe tomatoes, but a tomatillo is not a tomato at all. It's a fruit of a different plant and grows inside a papery husk. Tomatillos have a tart, fruity, slightly sour, and slightly herbal flavor. You can use them in salsas and sauces, although they can also be eaten raw too. Raw, tomatillos are much more acidic than tomatoes, and can have a slight aftertaste.