I bought some buttermilk for baking and when I opened it there were lumps. Yes, lumps. The buy by date is tomorrow, but it was in my car (unrefrigerated, but hey, it's winter) here in CA for just about an hour. Can I still use it in baked goods? Is this what it's supposed to look like? (Buttermilk novice, can you tell???)
Thanks in advance for any and all help.