I used the mixer the first time which gets the job done much faster, but I think if I'm going to be eating more butter I should get a good work out first and just shake it in a jar ;)
I got 2 cups of butter from 1 quart of heavy whipping cream, with about 2 cups whey leftover, which is apparently what "traditional" buttermilk is. makes me think I could use the whey in place of water with powdered buttermilk for a richer buttermilk pie. I'm so excited for holiday baking!
my arms are incredibly sore after an hour+ of shaking, and it's not really cheaper for me to make the butter and buttermilk (unless I get a good deal on cream), but it's so much better when it's homemade so I'll be making it for the holidays and special stuff... or maybe when I need a good workout :)