Step 1

Preheat oven to 350º F.Grease 13 x 9-inch baking pan.

Step 2

Beat butter in large mixer bowl until creamy.Beat in floursugar and salt until crumbly.With floured fingerspress 2 cups crumb mixture onto bottom of prepared baking pan; reserve remaining mixture.

Step 3

Bake for 10 to 12 minutes or until edges are golden brown.

Step 4

Combine 1 cup chunks and sweetened condensed milk in smallheavy-duty saucepan.Warm over low heatstirring until smooth.Stir in vanilla extract.Spread over hot crust.

Step 5

Stir nuts and remaining chunks into reserved crumb mixture; sprinkle over chocolate filling.Bake 25 to 30 minutes or until center is set.Cool in pan on wire rack.Cut into bars.