• Heat oven to 350F and line a 9×13 baking dish with parchment paper. Make sure you do not have holes or cuts in your paper anywhere.

Shortbread crust

• Add flour, sugar, salt, and butter into your stand mixer with a paddle attachment. Mix till all combined and dough is created.
• Add the dough into your lined pan and press down into a flat even layer. Bake at 350F for about 20 minutes or until a light golden color. Don't over bake it, as Gluten-Free dough would get very dry and crumbly very fast.

Orange Topping

• While your shortbread is baking, work on your Orange deliciousness. You will need a Lemon zest from 1 large lemon and an orange zest from 2-3 large oranges.  Combine zest with sugar. Mix in a stand mixer or food processor till the sugar turns orange color from zest oils. If you do want the flavor, don’t skip on fresh orange zest and fresh-squeezed orange juice. Dried zest and juice from the bottle won’t make the trick, unfortunately.
• squeeze juice from your lemon and oranges. You will need about a cup of orange juice and lemon is just for an extra flavor.
• Add eggs to your orange/lemon sugar and whisk till smooth. Add flour and orange extract. Whisk well until the ingredients are fully incorporated and no lumps remain. If you want to have your Orange bars brighter orange, you have to use quality eggs. Eggs from free-range chickens who run outside in the field eating not only grain have bright orange yolks. Eggs from chicken fed on grain only will have yolk more yellow. When I want to splurge on eggs, I buy from a local farmer.
• Pour the filling onto the warm crust then transfer to the oven and bake for about 20-25 minutes, turning halfway through the bake.
• The middle should still be a little bit jiggly, but not runny. I would say like jello, but the edges are getting set. Let it cool down before making the first cuts. At least two hours.
• When is cooled down, carefully pull your orange bars from a pan, that way it will be easier to cut. (here comes your parchment paper handy) I cut all my desserts with a wet knife. That way your knife doesn’t drag crumbles along with the cut.
• Dust with powdered sugar and enjoy.