Preheat oven to 350 degrees and grease an 8x8 baking dish lined with parchment paper with butter.
Zest and juice your oranges and set them aside.
FOR THE BARS: Whisk together, eggs, zest, and orange juice and set aside.
In your mixer cream together butter and sugar. Add flour and salt, mixing until it's combined.
Add in the egg mixture and beat on medium speed for 2 minutes.
Spread into the prepared baking dish and bake for 20-25 minutes, or until the edges are golden brown. Ovens vary, do not over bake or the bars will be dry.
FOR THE GLAZE: Combine powdered sugar, orange zest, and juice and whisk until smooth.
Pour over the bars and place in the refrigerator to set.
Cut to serve.
Store in the refrigerator.
Notes
You will need to zest and juice 2 - 3 large oranges for this recipe.If you don't have an 8x8 baking dish, you can use a 9x9 but will need to adjust your baking time a bit, as the bars will be thinner.