Lemon Squares

I made these for my 4th of July Party. I thought they were great. The recipe is simple and takes no time at all. This recipe is from the June 08 edition of Everyday Food Magazine. I made them 3 days ahead. I froze the leftovers. Very, very tart, but oh so good if you love lemon.


Ingredients

Makes 16
1/2 cup (1 stick) unsalted butter, room temperature, plus more for pan
1/2 cup confectioners' sugar, plus more for dusting
1/4 teaspoon salt
1 cup all-purpose flour (spooned and leveled)
4 large egg yolks
1 can (14 ounces) sweetened condensed milk
3/4 cup fresh lemon juice (from about 3 lemons)
Directions

Preheat oven to 350 degrees. Butter an 8-inch square baking pan. Line bottom with parchment paper, leaving an overhang on two sides; butter paper.
Make crust: Using an electric mixer, beat butter, sugar, and salt until light and fluffy. Add flour, and mix on low just until combined. Press dough into the bottom and 1/2 inch up sides of prepared pan; prick all over with a fork. Bake until lightly golden, 15 to 20 minutes.
Make filling: In a large bowl, whisk together yolks, condensed milk, and lemon juice until smooth. Pour over hot crust in pan; return to oven, and bake until filling is set, 25 to 30 minutes. Cool completely in pan.
Refrigerate until filling is firm, about 2 hours or up to 3 days. Using paper overhang, lift cake onto a work surface; cut into 16 squares, and dust with confectioners sugar.