This recipe for flourless peanut butter cookies comes from my friend, Lindsay. She is a superb pastry chef who has worked in 4-star restaurants for as long as I've known her, so I was surprised at the recipe's humbleness and simplicity. But when I made the recipe, I was floored by the complexity of their texture and flavor. These weren't just peanut butter cookies, they were the very essence of the timeless ingredient! I chalk it up to the fact that there's no flour or unnecessary fillers to dilute the pure, absolute peanut butter flavor. Combined with a texture that goes from chewy to melt-in-your-mouth, I knew these cookies were destined for a permanent spot in my baking repertoire.