If you want to freeze buttermilk but do not use it right away, you can store it in ice cube trays. Or, you can freeze it in freezer bags in the proportions you need. Freeze them in a gallon freezer bag and use them later, like if you are planning to make buttermilk pancakes. However, you must remember to label the containers and put a date on them. Here’s how to do it.
First, do not freeze buttermilk in its raw form. It is safe to freeze but will separate if it freezes. Similarly, it will not taste good when it thaws. While freezing is not an issue as long as you use it in cooking and baking, you should avoid freezing the raw buttermilk. This liquid is not suitable for drinking. So, you can safely store buttermilk in the fridge if you don’t plan on using it right away.
If you want to keep buttermilk, you can refrigerate it for up to three months. Once it thaws, you can stir it again or use an immersion blender to return it to a usable state. The consistency won’t be as thick as when you first made it, but it will still have that wonderful buttermilk taste. Buttermilk can be kept in the conventional freezer for up to three months, or up to six to 12 months in a deep freezer.