How Long Buttermilk Stays Fresh After Opening

Once opened, buttermilk can generally stay fresh for about one to two weeks when stored properly in the refrigerator. Its longevity largely depends on maintaining a consistent cold temperature, ideally below 40°F (4°C). To ensure maximum freshness, it is important to keep the buttermilk in its original container with the lid tightly sealed. Exposure to air can accelerate spoilage, so minimizing the time the container is open is crucial. Always return the buttermilk to the fridge promptly after use. Some signs that buttermilk has gone bad include an off or sour smell, mold formation, or a noticeable change in texture. It's important to note that buttermilk naturally has a tangy taste, so a slightly sour flavor isn't necessarily an indication of spoilage. However, if the taste is unpleasantly sharp or different from its usual tanginess, it may be time to discard it. For those who do not use buttermilk frequently, freezing is an option to extend its shelf life. When frozen, its texture may change slightly upon thawing, but it remains suitable for cooking and baking. Always check for expiration dates and rely on your senses to assess freshness, ensuring food safety and quality.