Chilles or chilies? Both spelling forms are right and both are hot. They have little aroma but vary in taste, from mild to fiery hot. Chillies are members of the capsicum family and come in all shapes and sizes. There are numerous varieties of chilies varying in size and strength of flavor. Commonly used in Eastern cooking are the red and green finger-like chilies about 4-inches long, and the tiny red and green bird’s eye chilies which are extremely hot.