I also used some white chocolate just because I had leftovers - and therefore ended up with "triple" chocolate cookies.
Maybe I should have chilled the dough a bit longer (mine was in the fridge for about four hours) because I had to bake the cookies a bit longer and they cracked as usually cookies do - despite the recipe says they won't. They also didn't firm completely but kept a chewy texture.But they did taste great and for are really, really great chocolate cookies!
For the recipe for Double Chocolate Cookies, buy the book by Dorie Greenspan and have a look at pp. 329/330!
