How Do You Know When Shallots Are Bad?
When shallots are bad, they typically have a soft or mushy texture, may have mold or black spots on their exterior, and emit a foul odor. They may also have started to sprout or have developed a bitter taste. Fresh shallots should feel firm and have an aroma that is slightly sweet and onion-like. It is best to discard any shallots that have gone bad to avoid any risk of foodborne illness.