01 - Preheat oven to 350°F (175°C) and line a baking sheet with parchment paper.
02 - In a large bowl, mix softened butter and granulated sugar until the texture is light and fluffy.
03 - Beat in the egg and peppermint extract until the mixture is fully combined.
04 - In a separate bowl, whisk together all-purpose flour, cocoa powder, baking soda, and salt.
05 - Gradually add the dry ingredients to the wet ingredients, mixing until a smooth, soft dough forms.
06 - Roll dough into 1-inch balls and arrange evenly on the prepared baking sheet. Gently press to flatten slightly.
07 - Bake for 10 to 12 minutes or until the edges are set. Cool cookies completely on a wire rack.
08 - Drizzle cooled cookies with melted white chocolate, then immediately sprinkle with crushed peppermint candy canes.