How long does it take for opened sour cream to go bad?

The length of time it takes for opened sour cream to go bad depends on various factors, including the temperature it is stored at, the packaging it is in, and how it is handled. Here is a general guideline:

1. Refrigerated: If unopened, store-bought sour cream can stay fresh for about 2-3 weeks past its printed "best by" date when kept continuously refrigerated at 40°F (4°C) or lower. Once opened, sour cream should be consumed within 1-2 weeks for best quality.

2. Unopened: Unopened sour cream that has been continuously refrigerated at or below 40°F (4°C) will usually stay fresh for about 1-2 weeks past its "best by" date.

3. Storage Temperature: Sour cream spoils more quickly at higher temperatures. Always store sour cream in the coldest part of the refrigerator (usually the back).

4. Signs of Spoilage: Look out for signs of spoilage, such as a sour or off smell, a change in taste or texture, or mold growth.

5. Proper Handling: Always use clean utensils when handling sour cream to avoid cross-contamination with other foods.

To ensure the safety and quality of sour cream, it is important to follow these guidelines and use your best judgment when consuming or discarding opened sour cream. If you have any doubts or concerns, it is always better to err on the side of caution and discard it.