This is the one that I use…
1qt Homestead Creamery Organic Whole Milk -Creamline
2c. Heavy whipping cream
4 ice cubes of double strength buttermilk (ripened 24hrs prior to freezing in standard ice cube tray)
Heat milk/cream to 86F, add the buttermilk cubes and continue heating to 88F and cubes are melted. Remove from heat, cover the pot and wrap in a towel. Leave on counter at room temp for 20hrs. Drain in a cheesecloth lined colander for 2hrs then secure the corners of the cheesecloth and hang to drain for 10hrs. Remove to container and chill overnight.
Note: For the buttermilk, just set jar full on the counter at room temp to allow it to thicken anywhere from overnight to 24hrs. I place a coffee filter over the mouth of the jar just to keep anything from falling in there. Then when it’s ready it can be frozen in an ice cube tray to use whenever you want it. ETA: Make sure your buttermilk is Cultured!
Also, the longer you hang, the thicker it will be. Usually by 12hrs I’m ready to have it because I’m impatient! 