I love buttermilk pie. I never tell people what it is called until after they taste it. I have a recipe for prune cake that uses buttermilk. It is really moist and yummy. I never tell people what it is called either until they taste it. My DH took a prune cake hunting a couple of years ago. I told him not to tell them what it is called. He did, no one ate any until the last day when the other sweets were gone. They all loved it and argued over who go to take the leftovers home. They now request it and a buttermilk pie every year.