Can buttermilk be frozen? Buttermilk Storage. Buttermilk will last up to 2 weeks due to its high acidity level, although it is best the first week. Once opened, it should be used within a week for drinking purposes, but it will be fine for baking often even after the expiration date.
https://www.thespruce.com/buttermilk-storage-1807745
Like milk, buttermilk can be frozen up to 3 months, but it is not recommended because it tends to separate. If you do freeze buttermilk, let it thaw in the refrigerator and be sure to mix it well to reincorporate the solids with the liquid.
https://www.thespruce.com/buttermilk-storage-1807745
I have about 1/4 gallon of buttermilk that has been expired for about 5 days. I want to use it but I don't know whether or not it is use-able, does anyone know a recipe that calls for soured buttermilk?
https://www.chowhound.com/post/expired-buttermilk-355842
If I left out buttermilk for 6 hours, I would probably still use it. If you asked this question on a French cooking forum, most people would probably deem it still safe to use (the French seem to be a bit less paranoid about refrigeration than Americans). However, if it makes you nervous to use it, just toss it.
https://food52.com/hotline/24268-how-long-can-buttermilk-stay-out-of-the-fridge-i-forgot-mine-over-6-hours-out
You can make “clabbered” milk, a widely recommended substitute for buttermilk in baked goods. The usual approach is to stir lemon juice into milk (1 tablespoon per cup) and let the mixture sit for 10 minutes to “clabber” (or thicken) before proceeding with the recipe.
https://www.cooksillustrated.com/features/8502-5-buttermilk-questions-you-were-too-embarrassed-to-ask
Fabiola, depends on the room temperature your buttermilk rested at. Six hours is a long time at normal room temp (65 to 70 degrees). If you throw it out, you can make your own buttermilk pretty easily: Put 2 tablespoons lemon juice or white vinegar in a measuring cup. Add 1 cup regular milk to fill to the 1-cup mark. Stir, let stand for 5 to 10 minutes at room temperature.
https://food52.com/hotline/24268-how-long-can-buttermilk-stay-out-of-the-fridge-i-forgot-mine-over-6-hours-out
When we used a mixture of cream of tartar and regular milk (1 1/2 teaspoons of cream of tartar for each cup of milk), our biscuits and pancakes came out just as lofty and light as those made with buttermilk, with no off-flavors.
https://www.cooksillustrated.com/features/8502-5-buttermilk-questions-you-were-too-embarrassed-to-ask
The good bacteria will stay active and the buttermilk will get thicker and more sour until it runs out of lactose. In fact- when your buttermilk container has about 1/2 cup left you can make more just by refilling the container with milk and leaving it to ferment on the counter for a day. If you use it up more quickly than the bacteria eat the lactose then you can keep this up indefinitely.
https://cooking.stackexchange.com/questions/1127/how-long-does-it-take-for-buttermilk-to-go-bad
When we asked this question of the folks at the dairy farm that produces the buttermilk we use in the test kitchen, they told us to consume their product within five to seven days after opening. However, guidelines from agricultural programs at various universities extend that period to two weeks.
https://www.cooksillustrated.com/features/8502-5-buttermilk-questions-you-were-too-embarrassed-to-ask
Like the others mentioned, buttermilk can be used well past the date. Yogurt, and sour cream, I use as well after expired, if necessary. I use 2/3 cup yogurt and 1/3 cup milk successfully in my bran muffins as I seldom have buttermilk on hand. Ci_lantro, I've never heard of growing your own buttermilk! Sounds very cool, and worth a try!
http://ths.gardenweb.com/discussions/2512577/expired-buttermilk
how long is buttermilk safe to use
Buttermilk is safe to use up to 2 weeks. Buttermilk is safe to use for up to 2 weeks.