I prefer to eat them cooled, when the chocolate chips are solidified and the rest of the cookie is soft. I have them with a cup of hot orange pekoe tea (clear thank you), which is absolute perfection.
Variation: Instead of chunks of milk chocolate, I lazily threw in chocolate chips. And, instead of making over-sized cookies, as suggested, I made them a standard cookie size, using my OXO cookie dough scoop. I ended up with over 4 dozen cookies, perfect for sharing.
Recipe for Double Chocolate Cookies are found here.