CHOCOLATE CRUMB BARS

CHOCOLATE CRUMB BARS 1 cup (2 sticks) butter or margarine, softened 1 3/4 cups all-purpose flour 1/2 cup granulated sugar 1/4 teaspoon salt 2 cups (12-oz. pkg.) Semi-Sweet Chocolate Chips, divided 1 can (14 oz.) Sweetened Condensed Milk 1 teaspoon vanilla extract 1 cup chopped walnuts, optional Beat butter in a mixing bowl until creamy. Beat in flour, sugar and salt until crumbly. With floured fingers, press 2 cups crumb mixture onto bottom of a greased 9x13 baking pan; reserve remaining of mixture. Bake at 350 for 10 to 12 minutes or until edges are golden brown. Combine 1 cup morsels and sweetened condensed milk in a small, 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 centre is set. Cool before cutting.