How do I know if my soup is spoiled?
Matthew Cannon
Updated on January 14, 2026
1 The soup tastes and smells sour, and it shouldn't.
If it tastes sour and it shouldn't, it's a good guess that your soup has spoiled. You may not want to taste it so use a spoon and give a spoonful of it a sniff instead. If it smells sour or otherwise off, this is another sign as well that it may have spoiled.