How Long is Buttermilk Good For (How Long Does Buttermilk Last) (2024)

If the recipe you’re using only calls for a half cup of buttermilk, what can you do with the rest of it and how long will it last? Today we’re sharing some information about buttermilk and how long it lasts.

Often used in pancakes, baked goods, and as a key ingredient to marinate chicken, buttermilk is a very versatile dairy product.

Most of us purchase buttermilk specifically for a recipe we’re following, and because buttermilk tends to be sold in larger quart-size containers, we want to ensure it stays fresh.

What is Buttermilk?

Buttermilk is a type of fermented dairy beverage. Traditionally, it was made from the liquid that remained after fresh butter was churned. Nowadays, store-bought buttermilk is made by adding lactic bacteria to milk. It has a tangy flavor and is thicker than regular white milk.

Shelf Life: How Long Does Buttermilk Last

According to information from the United States Department of Agriculture (USDA), buttermilk can be refrigerated for about 2 weeks, or frozen for up to 3 months.

Note: If you’re drinking buttermilk as a beverage or using it for salad dressing, it’s best to use it as soon as you can. If you purchased buttermilk for baking or for marinating chicken, it should be fine if you use it by the best before date.

How to Tell If Buttermilk Has Gone Bad

Similar to other dairy products, if the texture of the buttermilk changes from smooth to lumpy, it’s best to toss it. Other signs of spoilage include visible mold or a strong sour or unpleasant odor.

How To Extend Buttermilk’s Shelf Life

There are a few ways to extend the shelf life of buttermilk:

• Keep it refrigerated at all times. Avoid having it sit at room temperature. Unopened cartons of buttermilk will last longer than opened cartons.
• Store buttermilk in the body of the fridge, not in the door where it can be exposed to temperature fluctuations.
• Do not touch the open spout of the container with your fingers or your mouth. Instead, always pour buttermilk into a measuring cup or another container to avoid contaminating the carton.

Pro Tip: Similar to white dairy milk, buttermilk is also available in a powdered form. Use it in recipes calling for liquid buttermilk, such as baked goods.

Frequently Asked Questions

Can You Freeze Buttermilk?

Yes, buttermilk can be frozen. It is best used in recipes for marinades or in baked goods, instead of for drinking as a beverage. Shake well before using as you may notice that the texture has become slightly clumpy or it may have separated.

Can Expired Buttermilk Make You Sick?

Check the buttermilk closely for signs of spoilage. If the carton is unopened it may still be fine to use. If the buttermilk has spoiled, do not use it as it can pose the risk offood poisoning.

How Long Can You Leave Buttermilk Unrefrigerated?

Buttermilk should always be kept in the fridge and should not be left at room temperature for longer than 2 hours. If you notice that buttermilk has been at room temperature for longer than 2 hours, it’s best to toss it.

How Can You Fix Separated Buttermilk?

Similar to yogurt, the liquid part of buttermilk can separate from the solids. If there are no signs of spoilage, give the container a good shake. This should bring the buttermilk back to its regular consistency.