I buy a quart of buttermilk, because that's the only size available, every time I make cornbread. My recipe only calls for 1 cup so here's my dilemma what to do with the leftover. I will make pancakes sometimes but what else can I do with it. I think 9 times out of 10 it gets dumped down the drain because it doesn't have a long shelf life. Can you freeze it in smaller portions?? Any ideas or suggestions?