Is guacamole safe to eat the next day when its brown?

As a general rule, it is best to avoid eating any food that has changed in color, texture, or smell. When guacamole turns brown, it is an indication that it has oxidized and is no longer safe to consume. Eating spoiled guacamole can lead to foodborne illnesses and potential health risks, so it is important to discard it and make a fresh batch.

When guacamole is exposed to air, the enzymes in the avocado react with oxygen and cause the guacamole to turn brown. This process is known as oxidation and it can be slowed down by storing guacamole in an airtight container in the refrigerator. However, even when properly stored, guacamole will eventually turn brown and should not be eaten after it has done so.