How Long Is Sauerkraut Good Once It's Been Opened?

Once opened, sauerkraut's shelf life depends on storage conditions and the form in which it was purchased. If kept in the refrigerator, store-bought sauerkraut typically remains good for about four to six months. Homemade sauerkraut, once opened, can last for several months if stored properly in the refrigerator. It is important to keep the sauerkraut submerged in its brine to prevent spoilage. The cold temperature slows down the fermentation process, preserving its flavor and texture. However, always check for signs of spoilage before consuming, such as an off smell, discoloration, or mold growth, which indicate that it is no longer safe to eat. Over time, sauerkraut may become softer and develop a stronger sour taste, which is usually a natural part of the fermentation process, but it should still be safe to consume as long as no spoilage is present. Storing sauerkraut in an airtight container can help extend its freshness. Additionally, the use of clean utensils when handling sauerkraut can prevent contamination, further prolonging its shelf life. Always trust your senses and when in doubt, it's better to discard it to ensure food safety.
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How to store sauerkraut

An opened jar of homemade sauerkraut can remain good for up to six months. However, if you have store-bought sauerkraut, it's best to adhere to the manufacturer's guidelines regarding its shelf life after opening. While you can keep opened sauerkraut on the counter, it won't last as long that way—typically only about a month before it starts to dry out.

To maximize the shelf life of your opened sauerkraut, store it in an airtight container in the refrigerator. When serving, always use a clean utensil to minimize the introduction of additional bacteria into the cabbage.

It's wise to start checking your sauerkraut for spoilage after approximately four months. Look for changes in smell and appearance. If the sauerkraut develops a stronger odor or a rotten smell, it is no longer safe to eat. Additionally, it should maintain its lighter color; if it has darkened, it is too old and should be discarded. Lastly, be on the lookout for any fuzz, which indicates mold.

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