1. Heat oven to 375 degree F. Beat butter, confectioners' sugar, and salt in mixing bowl at medium speed until light and fluffy. At low speed, beat in flour just until blended. Press dough into the bottom of an ungreased 15-1/2x10-1/2-inch jelly-roll pan. Bake until top is golden, 15 minutes. Let cool 5 minutes. Reduce oven temperature to 350 degree F.Make filling::
2. Beat brown sugar, eggs, and butter in a mixing bowl at medium speed just until blended. Stir in pecans, vanilla, and salt. Pour the filling over the hot crust. Bake 20 minutes. Cool completely in the pan on a wire rack. Cut crosswise into 1-1/2-inch strips at 2-inch intervals, then cut diagonally to form diamonds. Makes about 54 bars.