Here's a really easy peanut butter cookie recipe (from here):
1 cup of sugar,
1 cup of peanut butter
and 1 medium egg
Thoroughly mix the ingredients together. Roll the dough into 1 inch balls then press a fork in to flatten slightly. Bake on an ungreased cookie sheet at 175 degrees Centigrade (350 degrees Fahrenheit) for 10 minutes. Easy! They taste so good, but I used a low fat peanut butter (all I had) and it was way too sweet so with a bit of tweaking these are sure to be one of my firm favourites to bake!