A round, flat griddle on which tortillas are cooked. In Mexico, comals used over open fires are usually made of unglazed earthenware. Those intended for use with electric and gas heat are more often made of a light metal, such as tin. The earthenware and thin metal allow fast heat penetration, thereby cooking the tortillas quicklyimportant so they don't become dry and brittle.
From The Food Lover's Companion, Fourth edition by Sharon Tyler Herbst and Ron Herbst. Copyright © 2007, 2001, 1995, 1990 by Barron's Educational Series, Inc.