A quick late TWD--these cookies are pretty much the answer to having few ingredients in the house and wanting great cookies with minimal effort. With just egg whites, sugar, flavorings, and nuts, the cookies taste a little like candy.
One of the reasons TWD is great is that I have an excuse to test all the recipes, and then I know what's worth making in the future. These are. The recipe is here. Oh, and by the way, I've entirely stopped using instant espresso powder. I just pour in a straight spoonful of finely ground coffee.