So, how long does buttermilk last? To begin with, dairy products will go bad at some point. The best way is to smell and look at the buttermilk: signs of bad buttermilk are an off smell, off color and a thick or clumpy texture. The precise answer depends to a large extent on storage conditions — keep opened buttermilk refrigerated and tightly closed. How Long Does Buttermilk Last in the Fridge? How to tell if buttermilk is bad? The shelf life of buttermilk is influenced by a variety of factors, such as the processing method and carton date, exposure to light and heat, and how the buttermilk is stored. © Copyright 2020 StillTasty LLC. How Long Does Buttermilk Last? Opened buttermilk can last up to 14 days in the fridge and slightly longer than its expiration date if unopened. How long does opened buttermilk last in the refrigerator? When properly stored at or below 40°F, containers of buttermilk last … In case you want to elevate the shelf life of the buttermilk in the fridge, then you should thaw the carton and then freeze it for maximum 3 months. All rights reserved. It can be frozen opened or unopened in an airtight container for up to 3 months. Depending upon the storage method, a buttermilk carton can last in a fridge for at least a month and could last for 1 or 2 weeks if opened. The freezer time shown is for best quality only - buttermilk that has been kept constantly frozen at 0° F will keep safe indefinitely. Before using it in a recipe, slowly thaw the buttermilk in the fridge or microwave with a low setting. Properly stored, it will maintain best quality for about 3 months, but will remain safe beyond that time. Sources: For details about data sources used for food storage information, please click here. How long does buttermilk last once opened? The precise answer depends to a large extent on storage conditions — keep opened buttermilk refrigerated and tightly closed. Freeze buttermilk in an airtight container and leave at least 1/2 inch headspace at the top, as buttermilk will expand when frozen; thaw in refrigerator. How long does buttermilk last in the freezer? Reproduction in whole or in part without written permission is strictly prohibited. To maximize the shelf of opened buttermilk, do not store it on the fridge door, as the temperature is too warm - the opened buttermilk will last longer when stored in the main body of the refrigerator, in its original package. Buttermilk shelf life is influenced by the processing method, packaging, and storage practice. Buttermilk that has been continuously refrigerated will keep for about 2 to 3 weeks after opening. To further extend the shelf life of buttermilk, freeze it; frozen buttermilk will often become separated and the texture may become somewhat grainy, but it is usually acceptable for cooking and baking purposes. How long does buttermilk last once opened?