cream butter, 2 cups flour and 1/2 cup sugar. Press in a 9x13 bake at 350 for 15 min.
Whisk 2 cups sugar, 2 Tablespoons flour and baking powder. Add Eggs and lemon juice. add eggs and lemon juice. Mix well. Pour over baked crust. Bake 25 minutes more. Cool. Sift powdered sugar over top.