01 -
Preheat the oven to 325°F and line a baking sheet with parchment paper or a silicone baking mat.
02 -
Whisk together all-purpose flour, black or dark cocoa powder, baking soda, cornstarch, and salt in a medium bowl. Set aside.
03 -
In a stand mixer bowl, mix melted and cooled butter with granulated sugar and brown sugar until fluffy, about 2 minutes.
04 -
Add eggs, vanilla extract, and mint extract (if using) to the butter and sugar mixture, mixing until smooth.
05 -
Gradually add dry ingredient mixture to the wet ingredients, mixing until just incorporated to avoid overmixing.
06 -
Fold dark chocolate chips and mint chocolate chunks gently into the dough.
07 -
Cover dough with plastic wrap and refrigerate for at least 30 minutes; overnight chilling is acceptable and improves control over spreading.
08 -
Shape dough into rough balls using 3 tablespoons for extra-large cookies (60g) or 2 tablespoons for large cookies (50g). Using a digital kitchen scale ensures uniformity.
09 -
Gently place candy eyes and green candy pearls onto the top of each dough ball.
10 -
Freeze the prepared dough balls for 10 minutes to reduce spreading during baking.
11 -
Bake the cookies at 325°F for 12–14 minutes. After removing from the oven, press additional decorations gently on top if desired.
12 -
Allow cookies to cool slightly on the baking sheet before transferring them to a wire rack to cool completely.