How To Make Buttermilk Recipe By BakeLikeAPro ★★★►►► OPEN ME FOR MORE INFO ! ◄◄◄★★★ In this very fast video recipe, I show you how to make buttermilk at home. 1 cup milk ( 250 ml / 250 gr ) 1 tablespoon vinegar ( 15 ml / 15 gr) That's it ! By the way,