Sift flour, powdered sugar, cut in butter till mix holds together.
Press into 13 x 9 pan. Bake at 350 for 20 mins. or till lightly brown. Beat eggs, sugar, lemon juice. Sift 1/4 c. flour and bak. powder, stir into egg mixture, pour over crust, and bake at 350 for 25 mins. Sprinkle w/ powdered sugar.