Preheat oven to 350°F and line an 8x8-inch baking pan with parchment paper.

Mix flour, powdered sugar, and butter until crumbly, then press into the bottom of the prepared pan.

Bake crust for 15 minutes until lightly golden.

Whisk together eggs and granulated sugar, then pour over the warm crust and bake for an additional 25-30 minutes until set.

Allow to cool completely in the refrigerator for at least 2 hours before cutting into squares.