Instructions: Heat oven to 350 degrees F. Grease 13x9x2-inch baking pan. In large mixer bowl, stir together butter, brown sugar, egg yolk, and vanilla; lend in flour and salt. Press mixture onto bottom of prepared pan.

Bake 25 to 30 minutes or until lightly browned.

Remove from oven; immediately sprinkle chocolate chunks on crust. Let stand until softened, about 5 minutes; spread evenly over crust.

Sprinkle pecans over top. Cool completely in pan on wire rack. Cut into bars. about 36 bars.

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