I made some very crispy PB cookies once entirely by accident. No
change to the recipe. Just that, when it called for "softened" butter
(real butter) I warmed it too long and wouun up with completely melted
butter - liquid! I used it anyway. The cookies spread out wide and
thin on the pan. It took less baking time, and theye didn't burn or
get overly brown, weren't too dry. Looked and tasted just fine.