|Source||Betty Fisher (1979)|
Sift flour, baking powder and salt into bowl; stir in brown sugar, walnuts, melted butter or margarine, egg and vanilla. Beat until completely blended. Pour into greased 8 x 8 x 2-inch baking pan. Bake at 350° for 25 minutes, or until firm on top. Set pan on rack to cool. Cut into squares. Can sift powdered sugar on top before cutting, if desired.