Lemon Bars

2 cups flour
1/2 cup powdered sugar
3/4 cup melted butter
4 TB flour
1 tsp baking powder
6 TB lemon juice
2 cups sugar
3 eggs beaten

Mix 2 cups flour, powdered sugar, and melted butter together until well blended. Pat mixture in bottom of a greased 9 x 13 baking pan. Bake at 350 degrees for 15 minutes.
Combine sugar, 4 TB flour, baking powder, lemon juice and eggs until thoroughly blended. Pour over partially baked crust and bake an additional 20 minutes at 350 degrees. Remove for oven. Cool slightly. Sprinkle with sifted powdered sugar if desired. Cut into squares and serve.