So I recently received some of my grandmother's old recipe cards and some of the dishes call for sour milk, which I have heard is what buttermilk used to be called (or maybe still is by some people)???
Additionally, I've heard you can make your own "sour" or buttermilk at home by adding 1 tsp. of lemon juice, per cup of milk. Again, anyone heard of this one? I think it would be great as I always end up buying buttermilk and throwing some of it away because I never seem to use the whole container.