What Is Buttermilk?

Easy never tasted so awesome.

Buttermilk has always been a fermented dairy drink, but the way it’s produced has changed over the years.

Today’s buttermilk has nothing to do with butter. The cartons you buy in the store were likely made using an industrial process that involved adding bacteria cultures to low-fat or skim milk. In the old days, though, buttermilk was actually a byproduct of churning butter. The buttermilk your ancestors used was made from the thin, rich-tasting liquid that was left at the bottom of the barrel.

Because of the bacteria cultures, room temperature buttermilk remained fresh longer than raw milk—this was especially useful before refrigeration was common in most households.

How to Make Buttermilk Substitute

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No buttermilk? No problem. You can actually whip up a perfectly capable buttermilk substitute with ingredients you probably already have on hand. All you’ll need is one cup of milk and one tablespoon of acid (white vinegar or lemon juice) to balance it out.

For one cup of milk, stir in one tablespoon of white vinegar OR one tablespoon of lemon juice. Let sit for 5 minutes.

If you don’t have the milk and acid you need, you can also use yogurt as a substitute. Since yogurt is typically much thicker than buttermilk, you may need to thin it with water before adding it to your recipe.