Pour heavy whipping cream into a mason jar and put the lid on.
Shake the heavy whipping cream in the mason jar. A little tip we learned this time around: you can do this in one jar, but splitting it into two will make the process easier and save you a little time. It’s also much easier on your arms.
Shake for about 10 minutes or until the butter begins to separate from the liquid (this liquid is buttermilk, and you can save it for future recipes, such as pancakes). Right before the butter forms, the liquid will get very thick like whipped cream; you will need to keep shaking until it begins to separate into a solid and a liquid.
Line a medium-sized bowl with cheesecloth.
Pour the mixture into the lined bowl, letting the liquid drain through the cheesecloth
Gather the corners of the cheesecloth and gently squeeze all the liquid out of the ball of butter; be very gentle in this process so you don’t squeeze the butter through the cheesecloth.
In a medium-sized bowl add ice water and knead the butter in an ice bath. This is important because it gets all the extra buttermilk off which helps prevent the butter from spoiling quickly.
Roll into a ball and allow to sit on parchment paper for a few minutes then you can place in a mason jar for storage.
Place in the refrigerator like you would regular butter.