These are a greeeeat invention! :0 i love the mild peanut butter flavor. This is a great, cheap cookie. I am a celiac and I can definitely appreciate this. I had 2 left over egg whites, and i had already messed up the kitchen, so i did them by hand. WHAT A WORK OUT! but totally worth it. All the people that had them come out flat. One of a few things happened. 1. You didn't whip egg whites long enough. 2. You added the sugar too quick or 3. You mixed the peanut butter too much. If the peanut butter is only partially mixed in, because then you have meringue with like swirls of peanut butter. Yum Yum. They are even good out right out of the oven! P.S. any recipe that calls for egg whites and cream of tartar and says to whip it into peaks=MERINGUE