Combine 2 cups flour and ½ cup powdered sugar in a medium bowl.
Cut in butter with a pastry blender (or fork) to make fine crumbs.
Press mixture into a 9×13-inch baking pan, pressing ½ inch up the sides.
Bake at 350 F for 15-20 minutes, until just golden brown at edges.
For filling, mix sugar, ¼ cup flour and baking powder; add lemon juice, lemon zest and eggs. Pour mixture over hot crust. Bake 20 additional minutes at 350 F. Cool completely.
Sprinkle lightly with powdered sugar. Cut into bars.
Special Diets:
Recipe Adjustment for Lemon Bars:
Select diet; follow recipe using substitutions below.
Reduced Sodium: No changes.
Reduced Cholesterol: Use 1 cup margarine in place of unsalted butter, and 1 cup Egg beaters in place of eggs. 0 mg cholesterol per serving.
Reduced Calorie: No changes.
Diabetic Exchanges (for original recipe): Not recommended.