Preheat your oven to 350°F (175°C) and line a 9x13-inch baking dish with parchment paper, allowing some overhang for easy removal.

In a mixing bowl, combine melted unsalted butter, granulated sugar, and vanilla extract.

Add in all-purpose flour and salt, stirring until a cohesive dough forms.

Press the dough evenly into the prepared dish and prick the surface lightly with a fork to prevent bubbling.

Bake the crust for 15-18 minutes or until the edges turn light golden brown.

In a separate bowl, whisk together the large eggs, granulated sugar, cornstarch, fresh orange juice, grated orange zest, and almond extract until smooth.

Carefully pour the orange filling over the warm crust and bake for an additional 20-22 minutes.

Remove the pan from the oven and allow the orange bars to cool at room temperature for 30 minutes.

Refrigerate the bars for at least 2 hours to fully set.

Dust with powdered sugar before slicing into squares.