FUDGY CHOCOLATE COOKIE BARS: Retro Ad & Recipe

I love Retro Recipe Ads. You've probably made something like this before, but this Retro magazine Ad has the recipe. You can always substitute other chocolate chips and different cocoa--and I always use butter (original recipe uses margarine or butter). These are delicious. The original recipe is for Hershey's chocolate chips and Eagle Brand Sweet Condensed Milk.

FUDGY CHOCOLATE COOKIE BARS

Ingredients
1 3/4 cups unsifted flour
3/4 cup confectioners’ sugar
1/4 cup HERSHEY’S Cocoa
1 cup cold butter
1 (12-ounce) package HERSHEY’S Semi-Sweet Chocolate Chips
1 (14-ounce) can EAGLE BRAND Sweetened Condensed Milk (NOT evaporated milk)
1 teaspoon vanilla extract
1 cup chopped nuts

Directions
Preheat oven to 350°. In medium bowl, combine flour, sugar, and cocoa; cut in butter until crumbly (mixture will be dry). Press firmly on bottom of 13×9-inch baking pan. Bake 15 minutes. Meanwhile, in medium saucepan, over medium heat, melt 1 cup chips with sweetened condensed milk and vanilla. Pour evenly over prepared crust. Top with nuts and remaining 1 cup chips; press down firmly. Bake 20 minutes or until set. Cool. Chill if desired. Cut into bars. Store tightly covered.