Lemon Bars

In a bowl, combine the flour, butter and confectioners' sugar. Pat into an ungreased 8-in. square baking pan. Bake at 350° for 20 minutes. , For filling, in a small bowl, beat eggs. Add the sugar, flour, baking powder, lemon juice and zest; beat until frothy. Pour over the crust. Bake 25 minutes longer or until light golden brown. Cool on a wire rack. Dust with confectioners' sugar. Cut into bars.