If you’ve ever wondered how to tell if mayonnaise is going bad, there are a few easy ways to tell. The consistency is uneven, and the oil separates from the liquid. If the mayo is past its sell-by date, it’s time to throw it out. If you’ve been using it for half a year or more, there’s a good chance that it’s gone wrong.
While it’s unlikely that your homemade mayonnaise is spoiled, it can be easy to spot if it’s spoiled. Its color will be yellow or brownish, and it will have lost its creamy texture.