I remember getting a copy of the Joy of Cooking a couple of decades ago specifically for the peanut butter cookie recipe (a childhood favorite), and was SO disappointed in the results that I eventually tracked down a 1975 copy to compare. The specifics elude me at the moment, but IIRC, the majo recipe differences came down to about twice as much peanut butter in the 1975 version, and twice as much flour in the new one.
Like, the results aren't even close to being comparable. The new recipe produces something you might call "peanut butter flavored shortbread", I guess.
Yeah I was a hard no on the new edition (my first copy, 1979, was a going-to-college gift from my truly wonderful parents-as-cooks). The reason being was when it came out multiple people noticed that the truly exquisite JoC brownie recipe was now mediocre. Why would they do that?
This feature of very long lived cookbooks with inconstant author lists needs to be better understood.
Like, the results aren't even close to being comparable. The new recipe produces something you might call "peanut butter flavored shortbread", I guess.