Lemon Squares

1/2 cup soft butter
1/2 cup soft margarine
2 cups flour
1/2 cup powdered sugar
dash of salt

Combine butter, margarine, flour, sugar and salt. Mix well. Pat into 9x13x2" pan, extending crust up the sides. Bake at 350 for 15 minutes.

Filling:
2 cups sugar
1/4 cup flour
4 eggs well beaten
1/2 cup lemon juice
Combine. Mix well. Pour over crust. Bake an additional 25 minutes at 350. Sprinkle with powdered sugar.