I made this recipe as is, and wow — I finally have a chocolate cookie that actually tastes like chocolate! Must be the amount of cocoa. It tastes just like chocolate cake, in fact, but with morsels of semi-sweet and white chocolate studding it. Easy recipe. I baked on airbakes and only increased the time by 1 minute; 10 minutes was good, then onto racks to cool. I doubled the recipe, and ended up with two good-sized tins full, perfect for giving some away this Christmas.