Preheat oven to 350°F (175°C). Line baking sheets with parchment paper.
Cream butter and sugars until light and fluffy.
Beat in eggs, vanilla, and peppermint extract.
In a separate bowl, combine flour, cocoa, baking soda, baking powder, and salt.
Gradually add dry ingredients to wet mixture; mix until combined.
Fold in chocolate chips and crushed peppermint.
Scoop dough into 2-tbsp portions onto baking sheets.
Bake 9–11 minutes or until edges are set.
Cool for 5 minutes, then transfer to a wire rack.
Optional: drizzle with melted chocolate or sprinkle more crushed candy on top.
