Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
In a medium bowl, whisk together the flour, baking powder, and salt. Set aside.
In a large mixing bowl, cream together the softened butter, granulated sugar, and brown sugar until light and fluffy.
Add the egg, vanilla extract, lemon juice, and lemon zest to the butter mixture and mix until well combined.
Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
Fold in the cream cheese, shredded coconut, and white chocolate chips until evenly distributed.
Drop tablespoon-sized portions of dough onto the prepared baking sheet, spacing them about 2 inches apart.
Bake for 10-12 minutes, or until the edges are lightly golden. Remove from the oven and let cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.