Preheat your oven to 375°F (190°C) and line two baking sheets with parchment paper.

In a medium bowl, whisk together the all-purpose flour, baking powder, and salt.

In a large mixing bowl, beat together the granulated sugar and softened unsalted butter with orange zest until light and fluffy.

Incorporate the egg into the creamed mixture and mix thoroughly.

Gradually add the dry mixture to the butter mixture, alternating with the fresh orange juice.

Scoop the dough and form it into balls, placing them on the prepared baking sheets about 2 inches apart.

Bake for 10-12 minutes until golden around the edges and soft in the middle.

Allow cookies to cool on the baking sheet for a few minutes before transferring to a wire rack.

Prepare the glaze by whisking together the confectioners' sugar, orange zest, fresh orange juice, and melted butter.

Once cooled, spread the glaze over the cookies.