Ghee has gone bad if it develops an off or sour smell, a bitter or metallic taste, or changes significantly in color or texture, indicating rancidity.
Ghee, being a clarified butter, has a relatively long shelf life, but it can still go bad over time due to oxidation and exposure to light, heat, and moisture. Here's how to identify rancid ghee:
Smell Test: The most obvious sign is an off or sour smell. Fresh ghee has a pleasant, nutty aroma. If it smells cheesy, sour, or generally unpleasant, it's likely gone bad.
Taste Test: If the smell is questionable, taste a small amount. Rancid ghee will have a bitter, metallic, or otherwise unpleasant taste that is distinctly different from its original flavor.
Visual Inspection: Check for changes in color and texture. While ghee can naturally vary in color from golden yellow to a deeper amber, a significant darkening or the presence of mold indicates spoilage. Also, look for changes in texture; excessive graininess or separation can be a sign of degradation.
If you observe any of these signs, it's best to discard the ghee to avoid consuming rancid fats, which can be harmful.
To extend the shelf life of your ghee, store it in an airtight container in a cool, dark place, away from direct sunlight and heat. Avoid using a wet spoon to scoop out ghee, as moisture can accelerate spoilage.