What did I end up making with the butter and buttermilk? Again I copied Kelly of Eat Make Read and made biscuits! With dried rosemary and a chopped up baby leek from the farmers market.
This was the first time I've tried making biscuits and they didn't rise very much. I'm not sure if the consistency of the batter was too wet. Or it could have been that I used white whole wheat flour. Or that I cut the dough into rounds too small. Despite not being fluffy, they still had a great buttery flaky taste.
I brought the biscuits, as well as extra butter for topping, to a friend's potluck and meant to take pictures but was having so much fun that I forgot! I will also add that the homemade butter has lasted a few weeks now and has not gone bad as I had read it might.