Key Lime Bars

Ingredients

• 1 large egg yolk 
• 2 large eggs 
• 1 cup flour all-purpose
• 2 tablespoons flour all-purpose
• 0.3 cup key lime juice 
• 1 teaspoon lime zest grated
• 0.3 teaspoon salt 
• 0.3 cup sugar 
• 1 cup sugar 
• 8 tablespoons butter unsalted softened (1 stick)

Equipment

• frying pan
• oven
• wire rack
• baking pan
• hand mixer
• aluminum foil

Directions

1. Preheat oven to 350F. Line an 8-inch square baking pan with foil, leaving an overhang. Mist foil with cooking spray.
2. Make crust: Using an electric mixer on medium-high speed, beat butter and sugar until light, about 2 minutes. Beat in flour and salt. Press evenly over bottom of pan.
3. Bake until firm and light golden around edges, 20 to 25 minutes. Cool slightly.
4. Make filling: Using an electric mixer on medium speed, beat eggs, yolk and sugar until smooth. Stir in lime juice and zest. Fold in flour.
5. Pour filling over crust and bake until set, 20 to 30 minutes. Cool on a wire rack. Cover and refrigerate for at least 1 hour or overnight. Use foil overhang to remove bars from pan to cut. Dust with confectioners' sugar just before serving, if desired.