In high school, our cafeteria had the best peanut butter cookies ever. They were extra peanut buttery and crumbly. They stuck to your palate making your mouth beg for cold milk.
A few years ago, my best friend gifted me with THE recipe (she has school district connections). Of course, the recipe makes about a hundred cookies. So, after quartering the recipe I tried them out. They just weren't the same. I tried and tried again, but I could never replicate the awesomeness..
This was also my first cookie error of the experiment. I know better and I ignored my baker's instinct.
My kitchen was insufferably hot the day I made these and I neglected to chill the dough before baking. This, of course, caused my cookies to spread to about the size of my hand making the famous crisscross marks almost nonexistent. They were still pretty tasty.