There are several ways to tell if guacamoles are wrong, but some simple ways to avoid them. The first way is to check for mold or growth on the surface of the dip. If you notice these signs, you should discard the dish. Otherwise, try eating it as soon as possible. Usually, guacamole will be edible for several months, but spoilage is always possible. To test for mold or other harmful organisms, look for brownish patches on the surface of the guacamole.
The presence of brown spots can signify that guacamole has gone wrong.