Interesting. Powdered buttermilk is my one standard ingredient I cannot find now. I use Saco and have not seen it or any other variety around. I'll probably have to switch to the liquid stuff. Powdered is more convenient and cost effective.
But, Ms. Parks said she reconstituted it which is not what Saco calls for. Saco says to add the powder to the dried ingredients and then add the liquid to the dry.
It does give me nice, fluffy pancakes and high rise scones. It works well in my English muffins too. But I am not sure how they will compare to buttermilk since I have not done her testing. But now is the time to test.