Peanut butter cookies are good. Very good, as a matter of fact. Though I had peanut butter and jelly sandwiches almost every single day that I took a bag lunch to school (K-12), I did not often have peanut butter cookies. Thinking about the reasons why this may have been, it occurs to me that perhaps the fact that we had peanut butter in the house did not mean that we had extra peanut butter in the house; we had peanut butter because we used it to make my sandwiches. One day, it occured to me that there were possibilities other than sandwiches. I set about to make peanut butter cookies.
I have no idea how old I was at the time, but things went smoothly until I had the balls of dough laid out on the baking sheets. Then disaster struck. "Disaster", I should say. I knew that I was supposed to mark the cookies with a fork. I got the fork and began pressing crosses in the tops. Unfortunately, the fork stuck like crazy and my cookies got uglier and uglier as I became more and more frustrated. I was probably 9 and, yes, ugly cookies are a disaster at that age. I assume that I went ahead and baked the cookies anyway, though after that I always shied away from making peanut butter cookies.
I think that when I was in college a friend told me that all I had to do was wet the fork with water to keep it from sticking. Shocking, I know.
I am proud to report that I am no longer wary of baking up a batch of peanut butter cookies.

Note: I use natural, salted peanut butter. You get a more buttery cookie by using the natural peanut butter, since it doesn't have all that extra sugar. The cookie will also be more brittle/crumbly if you use processed peanut butter, so I would recommend adding an extra tablespoon of butter.