Ultra-chewy, rich chocolate cookies with no added fat? And no gluten? Impossible! But it's true: these flourless chocolate cookies get their texture from egg whites, and their flavor from cocoa powder (which represents the only fat in the recipe). Plus they're easy: Just stir together a few simple ingredients, scoop onto a pan, and bake. You won't believe the delicious result. Speaking of delicious — adding chocolate chips nuts to this basic recipe takes these cookies to a whole new level.