You can typically keep an opened jar of mustard for one year in the refrigerator.
Mustard's remarkable shelf life after opening is primarily due to its ingredients and properties. Here's a breakdown:
-
Low Sugar Content: Unlike many other condiments, mustard has a naturally low sugar content. Sugar provides nourishment for spoilage microorganisms, so its scarcity helps prevent their growth.
-
Acidic Environment: Mustard is an acidic condiment which also inhibits bacterial growth.
-
Proper Storage is Key: To maximize the shelf life and maintain the quality of your mustard, always store it properly in the refrigerator after opening. Ensure the lid is tightly sealed to prevent air exposure.
-
Signs of Spoilage: While mustard generally lasts a long time, be vigilant for any signs of spoilage. These can include:
- Changes in Color: Significant darkening or discoloration.
- Offensive Odor: Any unusual or unpleasant smell.
- Changes in Texture: A significant change in consistency or the appearance of mold.
- Taste: While not recommended, if the taste is noticeably different or off, discard the mustard.
-
USDA Guidelines: According to the USDA, proper refrigeration is crucial for maintaining the quality and safety of opened condiments like mustard.
By storing your mustard correctly and watching for signs of spoilage, you can enjoy it for up to a year after opening.
