Lemon Squares

1 c. flour, sifted
1/2 tsp. baking powder
1/4 c. powdered sugar
1/8 tsp. Salt
1/4 tsp. salt
2 eggs, slightly beaten
1/2 c. margarine
2 T. lemon juice
1 c. granulated sugar
1 T. grated lemon rind
2 T. flour

Glaze:
1/2 c. powdered sugar, 1 T. lemon juice, 1 T. butter, melted

Combine flour, powdered sugar and salt in bowl. Cut in margarine until consistency of coarse crumbs. Press into greased 8x8 inch pan and bake 15 minutes at 325 degrees. Mix remaining ingredients. Spread over and continue baking for 25 minutes. Spread with the glaze while still warm.