1/2 cup butter at room temperature
1/2 cup confectioners sugar + more for dusting
1/4 tsp. salt
1 cup flour
4 large egg yolks
1 can (14 oz.) sweetened condensed milk
3/4 cup freshly squeezed lemon juice (about 3 lemons)
1.Preheat oven to 350 degrees.
2.Line a 8x8 square with parchment paper leaving an overhang on sides.
3.Beat together the butter, sugar and salt until fluffy.
5.In a large bowl, make the filling by whisking together the egg yolks, sweetened condensed milk and lemon juice until smooth.( and coloring if you want it a different color)
8.Using paper overhang, lift bars onto a work surface. Cut into squares and dust with powdered sugar.