These were made at the Soho Charcuterie, a popular restaurant in New York in the 1980's. They are the perfect combination of a bittersweet chocolate flavor with a chewy consistency, studded with pecans and chocolate chips.
Preheat the oven to 325*F. Line two cookie sheets with parchment paper or grease them lightly with vegetable oil.
Melt the 8 ounces of semisweet and unsweetened chocolate and the butter in the top of a double boiler placed over simmering water. Allow it to cool slightly.
Sift the flour, baking powder, and salt together into a small bowl and set aside.
Using an electric mixer on medium speed, beat eggs, vanilla, and espresso powder in a medium bowl until they are mixed together, about 10 seconds.
Add the sugar to the egg mixture and blend it all until thick, about 1 minute. Scrape bowl.
Add the melted chocolate and blend 1 minute more. Now scrape the bowl again.
Add the flour mixture on low speed and mix until blended, 10 seconds. Fold in the chocolate chips and nuts by hand. Drop the dough by generously rounded tbsl. about 2" apart onto the prepared cookie sheets.
Bake the cookies until they rise slightly and form a thin crust, about 13 minutes. Immediately move the cookies from the cookie sheets to a wire rack to cool. Enjoy!