Not really cookies, and not really cake. So they must be Cakies.
One cake mix (I used Duncan Hines chocolate), mix with 1 cup of plain yogurt, and 1 large egg. Add a few chocolate chips if you fancy. Roll spoonfuls of the mixture in icing sugar, and bake on a greased cookie sheet for about 13 - 14 minutes at 350. Some chocolate icing and a sprinkle of nuts will fancy them up a bit, but they're pretty good on their own.
Note to self: I really must stop eating all this good stuff.