These brown sugar chocolate shortbread cookies are a true Christmas miracle in my book. First of all, they take only four ingredients. Second of all, two of those four ingredients are chocolate and brown sugar, two of the best and most Christmas-y tastes in the world. Third, they are the perfect, perfect last minute Christmas gift if you have found yourself at that point in the holiday whirlwind. A plate of these and you are a Christmas superstar. Let's make them!