What is the shelf life of homemade buttermilk, and how can you extend it safely?

Question

I mixed whole milk with white vinegar to create a quick buttermilk substitute for a recipe. How long will this mixture last in the refrigerator?

FoodChemist · Answer

Because it is a quick acidification and not a true bacterial fermentation, homemade buttermilk substitutes should be stored in an airtight glass jar in the coldest part of the fridge and used within three to four days to prevent spoilage.

What is the shelf life of homemade buttermilk, and how can you extend it safely?

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