This simple chocolate pie recipe was brought to us by the knowledgeable folks at America's Test Kitchen. And we're not going to doubt their commitment to good food. They were kind enough to divulge their favorite chocolate to use in this particular recipe. Because dark chocolate is the star of the show here, you're going to want to take their recommendations seriously, folks. The best bittersweet chocolate, they say, is Ghirardelli 60% Cacao Bittersweet Chocolate Premium Baking Bar. Be aware that if you use a different brand, it may contain different amounts of sugar and then affect the overall taste of this gorgeous pie. Their preferred brand of unsweetened chocolate is Hershey’s Unsweetened Baking Bar.