Instructions: Make Crust: Preheat oven to 350 degrees. Blend flour and sugar in processor. Add butter; process using on/off turns until mixture resembles coarse meal. Transfer mixture to 8-inch square glass baking dish. Press mixture onto bottom and 3/4 inch up sides of dish. Bake until crust is golden brown on edges, about 15 minutes.

Meanwhile, prepare the Filling: Whisk sugar, flour, eggs, butter and vanilla extract to blend in large bowl. Stir in chocolate chips and nuts.

Pour filling into warm crust, smoothing surface. Bake until filling is golden brown and tester inserted into center comes out with moist crumbs attached, about 50 minutes. Transfer dish to rack; cool completely. (Can be prepared 1 day ahead. Store in airtight container at room temperature.) Cut into 16 squares.

This recipe yields 16 bars.

If you would like to email yourself the recipe for later use, or share the recipe with your friends or family, enter the email addresses below and this recipe will be emailed to you and others as well.