01 - Whisk together the flour, baking powder, and salt in a medium bowl. Set aside.
02 - Beat the unsalted butter and granulated sugar in a large bowl until light and fluffy, approximately 2 to 3 minutes.
03 - Add the egg, vanilla extract, and peppermint extract to the butter mixture and blend until smooth.
04 - Gradually fold the dry ingredients into the wet mixture, mixing just until incorporated.
05 - Cover the dough and refrigerate for at least 30 minutes until slightly firm.
06 - Preheat oven to 350°F (175°C). Line two baking sheets with parchment paper.
07 - Scoop tablespoon-sized portions of dough, roll into balls, and arrange them 2 inches apart on the prepared sheets.
08 - Gently flatten each dough ball with your palm, then sprinkle crushed peppermint candy canes, pressing slightly to adhere.
09 - Bake for 9 to 11 minutes until edges are lightly golden.
10 - Allow cookies to cool on the baking sheets for 5 minutes before transferring to a wire rack to cool completely.
11 - Melt white chocolate chips and drizzle over cooled cookies for added presentation and flavor.