They look classier over at Bakerella's beautiful blog, but i chose to shorten the process for almost immediate satisfaction.

1 cup peanut butter
½ cup sugar
1 egg
approximately 18 chips of chocolate

Preheat oven to 325ºF/ 160ºC
Mix peanut butter, sugar and egg until well blended.
Refrigerate for 30 minutes.
Pinch into 18 pieces and roll mixture into small balls.
Place on cookie sheet 2 inches apart.
Place a chip of chocolate in the centre of each cookie ball and flatten with a fork to make a criss-cross pattern.
Bake 18-20 minutes or until lightly browned.
Cool for 5 minutes on cookie sheet and then cool completely on a wire rack.