1 c. butter, melted
2 c. flour
1/2 c. powdered sugar

FILLING:

4 eggs, beaten
2 c. sugar
6 tbsp. lemon juice
1 tsp. baking powder
1/2 c. flour

Combine crust ingredients; press into 9 x 13 x 2 inch baking pan and bake at 350 degrees for 20 minutes. While crust is baking, mix filling ingredients; pour mixture over crust and bake 20 minutes more. Sprinkle with powdered sugar; cut into bars.