Best of Bridge Lemon Squares

When my sister in law was in town last week she made these squares for us from her Best of Bridge recipe.
She's a pretty good sister in law : )

Crust:

1 cup flour
1/2 cup butter
1/4 cup sugar
pinch of salt

Lemon Custard:

1 cup sugar
2 tbsps flour
1/4 tsp baking powder
zest of 1 lemon
juice of 1 lemon, about 3-4 tbsps
2 eggs, beaten

sprinkling of icing sugar

Combine crust ingredients and gently press into a prepared 9" square pan. Bake at 350F for 20 minutes.

While baking the crust prepare the lemon custard. Mix all the ingredients together and when the crust is ready pour the custard over top.

Bake at 350F for 25 minutes.

Cool. Sprinkle with icing sugar before or after cutting into squares.