Grandma's Lemon Bars

Stir together 2 cup flour and 1/2 cup powder sugar; cut in butter till mixture clings together. Pat into ungreased 9 x 13 pan. Bake 350 for 10-12 minutes. In mixer bowl beat eggs; add sugar, lemon peel and lemon juice. Beat until slightly thick and smooth, 8 to 10 minutes. (My filling didn't look any different after 10 minutes!) Stir together 2 tablespoons flour and baking powder; add to egg mixture. Blend just till moistened. Pour over baked layer. Bake at 350 for 20 to 25 minutes. Sift powdered sugar over top after you've let it cool. Makes about 40 bars.