Mix with pie blender:
1 Cup flour
1/2 cup butter
1/4 cup powdered sugar
Pour into 9x9 pan.  Bake about 15 min. @ 350
Beat 2 eggs.  Add 2 T. lemon juice and some rind
Mix 1 cup sugar, 2 T flour, 1/2 t B powder and add to eggs.
Pour over 1st layer.  Bake @ 350 degrees 20 - 25 Min.  Cool and frost.
Frosting
     1 1/2 C powdered sugar
     1 teas. vanilla
     2 T. butter
     1 1/2 T. milk