butter, you should discard the entire stick. While mold is extremely rare, it can happen.
Lastly, taste. A small test taste will quickly inform you of whether the butter has turned rancid. Spoiled butter will generally taste bitter or sour. Believe me, you’ll know.
A sticky or slimy texture on butter is also unusual. If you’re still unsure, it’s better to err on the side of caution and dispose of the butter.
butter and bread
source: Pixabay
Factors That Will Cause Butter to Spoil Faster
There are several ways that butter can spoil more rapidly:
Exposure to high temperatures, particularly above room temperature
Exposure to direct sunlight, especially near a window
High amounts of air getting into the butter through improper wrapping
Cross-contamination through the use of a dirty knife
Oxidation is the greatest contributing factor to rancid butter. Once air gets into butter, the fats begin to degrade. I
