Cook's Illustrated does it again with another superb recipe. Their peanut butter cookies have tons of peanut flavor and offer just the right balance of crisp on the edges and chewy in the middle. I brought them into work on Tuesday, and by Wednesday people were asking me if I was going to make more.
Unfortunately, access to the recipes on their site requires a paid subscription, and it would be a copyright violation for me to post the recipe. I suggest, though, either getting the online subscription or picking up a copy of The New Best Recipe, which is the updated version of their original cookbook. (The magazine subscription and some of their other books are worthwhile, too, with the web site probably the best value.)