Lazy Man's Macrons: Flourless Chocolate Fudge Cookies

On a quest to find an easy, fast dessert to bring to a friend's house for dinner last week, the internet gods heard my plea and sent a newsletter from King Arthur Flour into my inbox. Contained therein was the exact recipe I wanted: rich, chocolaty cookies with whopping total of six ingredients. Consisting solely of egg whites, cocoa powder, powdered sugar, vanilla, and salt, they were like macrons that decided to take a few weeks off from fancy-land to kick back in a hammock, drink painkillers, and not bother with makeup. They've got a crispy exterior that gives way to a melty-soft middle--similar to real macrons, but without the airiness, since the egg whites are not whipped first. The original recipe is here ; below I've listed my modifications. I made them smaller than suggested, as they are pretty rich, and a few of them go along way to taming any chocolate/sweet tooth you may have. I think sandwiching two of them together with s...