Although sealed sour cream may be stored up to 2 weeks beyond the sell-by date , it will lose flavor as it ages .
Sour cream should always be kept refrigerated .
Do not use the carton as a serving container .
Pour off the liquid separation in sour cream after opening or stir it back in .
Pink or green scum is an indicator of spoilage . Toss it out .
Before adding to any hot liquid , bring sour cream to room temperature .
