by Pete Ludlow, Mecox Bay Dairy
Adapted from Chew Chew Mama blog
SHAKE your container of cream until the butter begins to separate from the buttermilk. Then shake some more!
Tip: This will take about 20 minutes, so alternate with a partner. Don't worry, it's not possible to shake too much. There should be an obvious distinction between the yellow, solid butter pieces and liquid buttermilk - that's how you know you're done shaking.
SEPARATE the butter from the buttermilk. Pour off as much of the buttermilk as possible.
Tip: Make pancakes with your leftover buttermilk!
WASH your butter. Transfer the butter to a large bowl, and fill 3/4 full of COLD water. Using the wooden spoon, press the butter pieces together and against the side of the bowl. Dump out and refill the water at least 2 times- you know you're done when the water stays clear.
SALT your butter. Once the buttermilk is all washed out, add some salt and try it out! If you add too much salt, you can wash it out, just like you did the buttermilk.