Culture your Own BUTTERMILK recipe by Rebecca Lindamood

 So simple. https://www.foodiewithfamily.com/homemade-cultured-buttermilk/

Homemade Cultured Buttermilk

Ingredients:

• 1/4 to 1/2 cup cultured buttermilk (from the store or home cultured)
• 1 to 2 quarts skim,1%,  2%, or whole milk from the store or raw milk

Also needed:

• 1 clean, dry quart or half gallon jar with a tight fitting two piece lid.

Okay. Ready? If you blink you’ll miss how to do it.

Pour buttermilk (1/4 cup for a quart jar or 1/2 cup for a half gallon jar) into your clean jar. Top off the jar with your plain milk.

Tightly screw lid to the jar and shake vigorously for 1 minute. Place in a warm (but not hot) area out of direct sunlight.

Let it sit there for 12 to 24 hours, until thickened. Refrigerate when thick.

Use within two weeks. If you re-culture this regularly, you can carry on re-culturing indefinitely.