Submitted by: Angelque~TX
Source: Nestles.com

1 cup (2 sticks) butter or margarine, softened
1-3/4 cups all-purpose flour
1/2 cup sugar
1/4 teaspoon salt
2 cups (12-oz. pkg.) semisweet chocolate morsels, divided
1 can (14 oz.) sweetened condensed milk
1 teaspoon vanilla extract
1 cup chopped walnuts or pecans, optional

PREHEAT oven to 350° F. Grease a 13 x 9-inch baking pan.

BEAT butter in a large mixing bowl until creamy. Beat in flour, sugar and salt until crumbly. With floured fingers, press 2 cups crumb mixture onto bottom of prepared baking pan; reserve remaining mixture. Bake for 10 to 12 minutes or until edges are golden brown.

COMBINE 1 cup morsels and sweetened condensed milk in a small, heavy-duty saucepan. Warm over low heat, stirring until smooth. Stir in vanilla extract. Spread over hot crust.

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