Butter

I don't know how many of the people whose blogs I read, read mine in return, but perhaps one of you with the same interests will have an idea what I'm looking for.
Last week I read a post about how to make butter using a jar. You take cream (unpasturized being best) and shake it in a jar until it starts to form butter. You pour out a liquid (buttermilk).
I think you use a fork or spoon to press out all the buttermilk.
And that's all I can remember, because I was a dolt and didn't make a record of all the steps.
I've looked on the internet, but they mention recipes where you wash the buttermilk down the drain while making the butter - which seems wasteful when you can use it to make bread and biscuits and such.

So, what I'd like to know, is if any of you have read this post, or know how to make butter without wasting the buttermilk. I'd appreciate it. Thanks!