Barbara's Lemon Bars

Crust:
8 Tbl (1 stick) butter, softened
1/4 cup sugar
1 cup all-purpose flour

Filling:
2 lg eggs
1 lg egg yolk
1 cup sugar
1/2 cup fresh lemon juice
1 tsp grated lemon zest
2 Tbl all-purpose flour
Confectioners' sugar for dusting

Preheat oven to 350F. Line an 8-in square baking pan with foil, leaving an overhang.  Mist with cooking spray.  Make crust using an electric mixer on med-hi speed.  Beat butter and sugar until light, about 2 minutes.  Beat in flour.  Press evenly into foil-lined pan.  Bake until firm and lightly golden around edge, 20-25 minutes.  Cool slightly.  Make filling using an electric mixer set on medium speed.  beat eggs, extra yolk, and sugar until smooth.  Stir in lemon juice and zest.  Fold in flour.  Pour filling over crust and bake until set, 20-30 minutes.  Cool on wire rack.  Cover and refrigerate at least 1 hour or overnight.  Use foil overhang to remove bars from pan to cut.  Dust with confectioners' sugar just before serving.