"Real buttermilk" refers to the traditional, authentic form of buttermilk that is made from the liquid left behind after churning butter. It has a tangy flavor and a thick, creamy texture. Full definition
Just out of curiosity, when you say buttermilk, are we talking the thick, cultured buttermilk available at the store, or the thinner real buttermilk from the actual butter making process? (glutenfreeonashoestring.com)