There are people who love chocolate, and then there are people who love chocolate. This cookie is for the latter group. It is a little like a brownie, a little like fudge, and quite like the most chocolaty treat you’ll ever eat. We melt unsweetened and bittersweet chocolate together and mix them into the batter, and then fold chocolate chunks into the batter, too. Walnuts are there for those who like nuts in their cookies, but you can omit them if you want only chocolate. This recipe