How to Make It
Whisk together first 3 ingredients in a medium bowl. Combine sugars and butter in the bowl of a stand mixer; beat at medium speed 5 minutes or until fluffy. Add vanilla and eggs, mixing until just combined. Add flour mixture, mixing at low speed until almost combined. Add nuts and chocolate, mixing until just combined. Chill dough 30 minutes.
Preheat oven to 350°. Line a 13- x 9-inch baking pan with parchment paper.
Press chilled dough into prepared baking pan; bake 22 minutes or until a toothpick inserted in center comes out clean. Transfer pan to wire rack to cool. Cut into bars.