Preheat your oven to 350°F (175°C) and line two baking sheets with parchment paper.

In a bowl, whisk together flour, baking powder, and salt; set aside.

In a large mixing bowl, cream the softened butter and sugar until light and fluffy.

Add the egg, orange zest, orange juice, and vanilla extract; mix until well combined.

Gradually incorporate the dry ingredients into the wet mixture until just combined.

Drop rounded cookie dough onto prepared baking sheets about 2 inches apart.

Bake for 10 to 12 minutes or until edges are lightly golden. Let cool slightly before transferring to a wire rack.