Step 1

Pour just under 2 cups of milk into a clean pint-size mason jar.

Step 2

Add 2 tablespoons cultured buttermilk (be sure it says "live cultures" if it's store-bought) or read the instructions that came with your dehydrated cultures for the amount.

Step 3

Place lid lightly on jar, allowing it to breathe, set it a warm area of your home away from other cultures or ferments.

Step 4

Let sit for 8-12 hours.

Step 5

Once it's as thick as you'd like, move it to the refrigerator and let it sit for 6-8 more hours. Your buttermilk is now ready to drink or use in recipes!