Homemade Buttermilk

It is much more cost effective to make buttermilk at home than to continue to buy it from the store. I started mine in a pint size ball jar but now have mine in a quart size. Take a bit (1/4th of the jar worth) of store bought buttermilk and pour it into the bottom of your jar. Pour whole milk on top of the buttermilk. Close the jar and shake. Place the jar in a cool dark cupboard for 24 hours then into the fridge for storage. You now have buttermilk. Once I start to get a little low on my buttermilk I pour whole milk in the jar and repeat the process to keep it up. You need to pour it into a new jar or bowl to wash your current jar every so often to prevent strange things from growing.