I came across the recipe for these rather delicious gooey and chewy chocolate cookies on the martha stewart website. The recipe is in a collection of their favourite cookie recipes, there are some more which i will definately try. The only change i made was that I didn't happen to have 1/2lb of milk chocolate, I had about 4oz of dark chocolate so i melted about 1/3 of it with the butter and chopped the rest - they were still absolutely delicious. - I think they would also be good for sandwiching icecream. Here is the recipe.