Chocolate Cookie Bars

Directions

1. 1
   Preheat oven to 350 degrees F (175 degrees C).
2. 2
   Process flour, sugar, and cocoa powder in a food processor until combined. Add butter and process until mixture is crumbly. Press into the bottom of a 9x13-inch baking pan.
3. 3
   Bake in the preheated oven until lightly browned, about 15 minutes.
4. 4
   Combine condensed milk and 1 cup chocolate chips in a bowl. Microwave 1 minute. Stir; continue microwaving in 20-second intervals until chocolate is melted and mixture is smooth. Add vanilla extract and stir.
5. 5
   Pour chocolate and milk mixture over the baked crust. Top with remaining chocolate chips and walnuts.
6. 6
   Bake in the preheated oven until set, about 20 minutes. Let cool before cutting into 24 or 36 pieces.