Lemon Bars

2 c. flour
1/2 c powdered sugar
1 c butter or margarine
4 eggs, beaten
2 c sugar
1/3 c lemon juice
1/4 c flour
1/2 tsp baking powder

Sift together 2 c flour & powdered sugar.  Cut in butter until mixture clings together.  Press into 9x13" baking pan.  Bake 375 for 15-20 minutes or until lightly browned.  Then, beat together eggs, granulated sugar, & lemon juice.  Sift together 1/4 c flour & baking powder.  Pour over baked crust.  Bake 25 minutes at 350.  Sprinkle with additional powdered sugar.  Cool.  Cut into bars.