01 - Preheat the oven to 350°F. Line two baking sheets with parchment paper.
02 - Whisk together flour, baking powder, baking soda, and salt in a medium bowl. Set aside.
03 - Cream together softened butter, granulated sugar, and brown sugar in a large bowl until light and fluffy, about 2-3 minutes.
04 - Add eggs one at a time, beating well after each addition. Mix in ube halaya, vanilla extract, and ube extract until fully combined and the dough is evenly purple.
05 - Gradually add the dry ingredients to the wet mixture, mixing until just combined. Do not overmix.
06 - Fold in the white chocolate chips until evenly distributed throughout the dough.
07 - Scoop tablespoon-sized portions of dough onto the prepared baking sheets, spacing them 2 inches apart.
08 - Bake for 10-12 minutes, or until the edges are set but the centers are still soft.
09 - Allow cookies to cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.