01 -
Set the oven to 350°F (180°C).
02 -
Butter an 8-inch square baking pan lined with parchment paper, leaving extra paper hanging over the edges to make it easier to remove the squares later.
03 -
Break the graham crackers into pieces and add them to a food processor. Process until completely crumbled. Add sugar and melted butter, and mix until the mixture is homogeneous. Press this mixture firmly into the bottom and 1 inch up the sides of the prepared pan to form a crust.
04 -
Bake the crust in the preheated oven for 10-12 minutes, or until it is light brown. Remove and set aside to cool completely in the pan.
05 -
In a bowl, whisk together the condensed milk and egg yolks until smooth. Add fresh lemon juice and continue whisking until the filling is homogeneous.
06 -
Once the crust has cooled, pour the creamy lemon filling into the crust. Bake in the preheated oven for 15-20 minutes, or until the filling is set and the crust is golden brown.
07 -
Let the lemon squares cool completely in the pan on a cooling rack. You may also refrigerate them after they cool to room temperature for a firmer texture. Once cooled, use the parchment paper to lift the squares out of the pan and onto a cutting board. Cut into 16 small squares or 9 larger squares.