This one is simple. A fresh eggplant basically smells like… nothing. It’s very neutral, like a blank page. If you get a whiff of something sour, bitter, or just “off”, trust your nose.
A bad eggplant can develop a strange, almost fermented smell. It’s that “I don’t know what that is, but I don’t want to eat it” scent. Your senses are smarter than you think. If it passes the visual and squeeze tests but smells weird, don’t risk it.
I once ignored a funky smell because the eggplant looked fine. I made baba ganoush, and the whole kitchen smelled like a biology experiment. I threw it out and ordered pizza. Lesson learned: your nose is a free, always-available food inspector.
How to Know When Eggplant is Ripe (The Pro Squeeze Test