Lemon Squares

This is my Grandmother's recipe and I've been requested by a Client to make them...soo......

Preheat oven to 300F.

Using your hands mix together:
1 Cup flour
1/2 c butter softened
1/4 Cup confectioners sugar

Press into an 8x8 ungreased pan building up the sides 1/2 inch.  Bake for 20-25 minutes or until crust is slightly browned.

While baking beat together until light and fluffy:
2 eggs
1 cup sugar
1/2 tsp baking powder
1/8 tsp salt
Lemon zest of 1 small lemon (about 2 Tbsp zest)
2 Tbsp lemon juice

Turn up heat to 350F.

Pour over hot crust.  Bake for 25 minutes or until center springs back when lightly touched.  Cool.  Cut into squares.  Sprinkle with Confectioners sugar.