One of Hernández's most renowned works of art is "Sun Mad", a screen print that "speaks of the impact of the overuse of pesticides and the effect they have on the farm workers, consumers and the environment." In speaking about the work, she said, "I focused on something personal, the Sun Maid box." "Slowly I began to realize how to transform the Sun Maid and unmask the truth behind the wholesome figures of agribusiness. "Sun Mad" evolved out of my anger and my fear of what would happen to my family, my community, and to myself." San Francisco Chronicle art critic, Kenneth Baker, says of this print that "Ester Hernandez's bitterly comic revisionist screen print, "Sun Mad", successfully dovetails artistic intervention, political animus, and pop culture raw material."