Easy to make, easier to eat

Chocolate shortbread to soothe the soul.  Not that anyone's soul needs particular soothing these days, but Aidan has been feeling a little under the weather so it seemed like the thing to do on a quiet Sunday evening.  I had a piece for breakfast today (oh, like you wouldn't) and it was so good.  At first I thought maybe I hadn't used enough sugar, but today I think they're just right.  Two sticks of butter, 1/2 cup of sugar, 4 largish squares of melted bittersweet chocolate, 1 cup whole wheat flour, 1 cup regular flour.  Bake 40 - 50 minutes at 300 degrees.  Cool on a rack.  Try not to eat the entire thing at once (they really are better the next day).