Substituting cream with buttermilk?
I ran out of cream. I don't have any milk. I want to make scalloped potatoes. Can I substitute the cream for buttermilk?
Not in scalloped potatoes unless you want them to taste a bit like sour cream. Not terrible but probably not what you are aiming for. Anymore buttermik is a cultuard product like yogurt or sour cream, it for the most is quite low fat and you miight end up with curds in a baked product like scalloped potatoes. It is delicious in mashed potatoes. Alas, the days of real buttermilk as a byproduct of chruning milk for butter are gon unless you know a dairy farmer who makes butter for their own consumption.