Because we had our own fresh cow milk when I was growing up (nothing in a carton or plastic container for us, thank God) we often had buttermilk pie.  It has always been one of my favorites and still is.

If you read this article, be sure to scroll down past the middle of the item to finish reading the rest of the information.  I almost missed it because I thought the first couple of paragraphs was all there was to it!

Interesting history here!

https://www.tasteofhome.com/article/desperation-pies/?_cmp=recipeoftheday&_ebid=recipeoftheday772019&_mid=289622&ehid=0a751fbc7f78c074ef8afe6e6305dc4e505cd2f6&os_ehash=0a751fbc7f78c074ef8afe6e6305dc4e505cd2f6