1 1/2 cups all-purpose flour
1/2 cup packed light brown sugar
1/2 cup cold butter or margarine
1 2/3 cups (10 ounce package) Reese's
    Peanut Butter Chips, divided
1 (14 ounce) can sweetened condensed milk
1 egg, slightly beaten
1 teaspoon vanilla extract
3/4 cup chopped walnuts
Confectioners' sugar (optional)

Preheat oven to 350 degrees F.

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

Meanwhile, in large bowl, combine sweetened condensed milk, egg and vanilla extract; stir in remaining chips and walnuts. Spread evenly over baked crust. Bake 25 minutes or until golden brown. Cool completely in pan on wire rack. Cut into 2 to 2 1/2-inch squares; cut squares diagonally to form triangles. Sift confectioners' sugar over top, if desired.

Makes 24 to 48 triangles.