Step 1

Preheat oven to 350°F.

Step 2

In a medium bowl, blend together cubed butter, flour and sugar with a pastry cutter, a food processor, or your hands. Press into the bottom of a 9x13 inch pan lined with parchment paper.

Step 3

Bake for 15 minutes in the preheated oven, or until the edges are just starting to brown.

Step 4

In a large bowl, crack eggs and whisk them.

Step 5

To the eggs, add sugar, flour, orange juice, and orange zest. Whisk well, until no clumps remain. Pour over the baked crust after it is done baking.

Step 6

Once the filling has been added, bake for an additional 20 minutes. (Do not cover.)

Step 7

Remove from oven and let bars cool to room temperature. Place in the refrigerator for at 2 hours then dust with confectioners sugar before serving.

Step 8

Cut into squares and serve.