Preheat oven to 350°. Generously butter 8-inch square baking pan, lightly dusted with flour. In large mixing bowl with electric mixer, combine 1 cup flour, butter, 1/4 cup confectioners' sugar and cream cheese. Beat until crumbly. Press dough into prepared baking dishpan and bake for 20 minutes. In meantime, combine granulated sugar, 2 tablespoons flour, eggs, lemon juice, lemon rind and baking powder; beat until smooth. Spread mixture over baked layer; bake 25 minutes. Remove from oven. Cool 10 minutes. Run knife around outer edge of pan. Sprinkle with confectioners' sugar and slice into squares.