01 - Preheat the oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together the flour, baking soda, and salt until evenly distributed.
03 - In a large bowl, beat the softened butter and granulated sugar using an electric mixer or whisk until light and fluffy, about 2 to 3 minutes.
04 - Add the egg, vanilla extract, and peppermint extract to the butter mixture, beating until fully combined.
05 - Gradually add the dry ingredients to the wet ingredients, stirring gently until just incorporated to avoid overmixing.
06 - Fold in the crushed peppermint candies and white chocolate chips if using, ensuring even distribution throughout the dough.
07 - Scoop tablespoon-sized amounts of dough onto the prepared baking sheets, spacing them approximately 2 inches apart to allow for spreading.
08 - Bake the cookies for 10 to 12 minutes, or until the edges turn lightly golden and the centers are set.
09 - Let the cookies rest on the baking sheets for 5 minutes before transferring them to a cooling rack to cool completely.