-
Preheat the oven to 325˚ F. Line a few sheet pans with parchment paper. When oven is preheated, place pecans in a small pan and toast for 10 minutes or until crisp and golden. Set aside to cool while making batter.
-
Place the butter, 6 ounces of the chocolate chips, and the unsweetened chocolate, in a microwave-safe bowl. Heat on high for 1 minute, remove from microwave and stir. Heat for another 30 seconds, then stir again. Repeat until mixture is just melted. Cool for 15 minutes.
-
In the bowl of an electric mixer fitted with the paddle attachment, beat the eggs and vanilla until combined. Add the sugar, raise the speed to medium-high, and beat for 2 more minutes, until the batter is thick and falls back on itself in a ribbon. Set aside.
-
With the mixer on low, slowly add the chocolate mixture to the egg mixture. Combine the flour, baking powder, and salt in a small bowl and fold it into the chocolate mixture with a rubber spatula.
-
In another bowl, combine the pecans, peanut butter chips, the remaining 6 ounces of chocolate chips, and the toffee bits and fold it into the chocolate mixture. Scoop rounded mounds of batter 1 inch apart onto the prepared sheet pans.
-
Bake for 13-15 minutes. (I like to under bake them slightly, so that they're soft and chocolatey in the centers and crisp on the outsides. Cool on the baking sheets.