Chocolate Walnut Crumb Bars

1 cup butter-softened
2 cups flour
½ cup sugar
¼ tsp. salt
2 cups chocolate chips
1 can sweetened condensed milk
1 tsp. vanilla
1 cup chopped walnuts

Mix butter, flour, sugar, and salt until crumbly. Press 2 cups of crumbs into
9 x 13 inch greased pan. Bake at 350 for 10-12 minutes or until edges are golden brown.

Warm 1 ½ cups chocolate chips and sweetened condensed milk until smooth. Add vanilla. Spread over hot crust. Stir chopped nuts and remaining ½ cup chocolate chips into crumb mixture. Sprinkle over filling. Bake 25-30 minutes. Cool. Cut into squares.