Prepare the Dry Ingredients:

1. Preheat the Oven: Preheat your oven to 350°F (175°C) and line two baking sheets with parchment paper.
2. Mix the Dry Ingredients: In a medium bowl, whisk together the flour, baking powder, baking soda, and salt. Set aside.

Prepare the Wet Ingredients:

3. Cream the Butter and Sugar: In a large bowl, use an electric mixer to beat the softened butter and sugar until light and fluffy (about 2-3 minutes).
4. Add the Egg: Add the egg and continue beating until fully combined.
5. Incorporate the Orange Juice, Zest, and Vanilla: Stir in the orange juice, orange zest, and vanilla extract until fully incorporated.

Combine and Form the Dough:

6. Combine Wet and Dry Ingredients: Gradually add the dry ingredients to the wet mixture, mixing until just combined.
7. Add White Chocolate Chips (Optional): If using, fold in the white chocolate chips for added sweetness and texture.

Shape and Bake the Cookies:

8. Scoop the Dough: Use a cookie scoop or tablespoon to portion out dough onto the prepared baking sheets, spacing them about 2 inches apart.
9. Bake: Bake the cookies in the preheated oven for 12-15 minutes, or until the edges are lightly golden and the centers are set.
10. Cool: Allow the cookies to cool on the baking sheets for 5 minutes before transferring them to a wire rack to cool completely.