Your nose is probably the most honest judge in the kitchen. Bring that sweet potato close and give it a good sniff. A fresh one smells earthy, a bit like dirt and sunshine. It should not smell sweet in a funny way, or sour, or like old socks.
If it smells musty, fermented, or just plain off, it’s gone bad. That smell is the potato telling you, “I’m done.” Don’t try to argue with your nose—it’s always right about these things.
I once ignored a suspicious smell because I really wanted fries. The fries tasted like regret. Learn from my mistake.
Mold and Spots: The Obvious Signs
This one is pretty straightforward. Look for any fuzzy patches of mold—white, green, or black spots on the skin. A little bit of mold can spread deeper than you think, even if you cut it off.
How to Tell When a Sweet Potato Is Bad: 5 Clear Signs
Small dark spots or bruises are usually fine; just cut them away. But if the potato is covered in soft, sunken black spots or has a slimy film, it’s a no-go. You don’t need to be a scientist to know that moldy food isn’t a good dinner guest.
Pro tip: if you see white roots or little sprouts poking out, that’s actually okay—it’s just trying to grow a new plant. Cut the sprouts off, and the rest is usually fine, unless the potato is also squishy.
