Start by creaming together the butter and granulated sugar in a mixing bowl until light and fluffy. This step is crucial to creating a smooth and tender cookie texture.

Add the whole egg, egg white, grated orange peel, vanilla extract, and orange extract to the butter-sugar mixture. Mix well to combine, ensuring that the flavors are evenly distributed throughout the dough.

In a separate bowl, sift together the all-purpose flour, baking powder, and salt. Gradually add the dry ingredients to the wet mixture, stirring gently until a soft dough forms.

Pour in the orange juice and continue to mix until the dough comes together. The orange juice not only adds flavor but also helps bind the ingredients together.

Divide the dough into small portions and roll each portion into a ball. Using a scalloped cookie cutter, press down on each ball to create the signature scallop design on the edges of the cookies.

Place the shaped cookies on a baking sheet lined with parchment paper and bake in a preheated oven until golden brown. The aroma of freshly baked orange scallop cookies will fill your kitchen, signaling that they are ready to be enjoyed.