Hershey's? Chocolate Chip Bars

1 1/2 cups all-purpose flour
1/2 cup packed light brown sugar
1/2 cup cold butter or margarine
2 cups (12 ounce package) Hershey's? semi-
    sweet chocolate chips, divided
1 (14 ounce) can sweetened condensed milk
1 egg, slightly beaten
1 teaspoon vanilla extract

Heat oven to 350 degrees F.

In medium bowl, stir together flour and brown sugar; cut in cold butter until crumbly. Stir in 1/2 cup chocolate chips; press mixture on bottom of ungreased 13 x 9-inch baking pan. Bake 15 minutes.

Meanwhile, in large bowl, combine sweetened condensed milk, egg and vanilla extract. Stir in remaining 1 1/2 cups chips and nuts. Spread evenly over baked crust. Bake 25 minutes or until golden brown. Cool completely in pan on wire rack. Cut into bars.

Makes about 36 bars.