Preheat your oven to 350°F (175°C). This ensures that your cookies bake evenly.
In a medium bowl, whisk together the all-purpose flour, baking cocoa powder, baking soda, and salt. Set this mixture aside.
In a large mixing bowl, beat the room temperature butter, sugar, and brown sugar together using an electric mixer until the mixture is light and fluffy. This should take about 2-3 minutes.
Add the eggs, vanilla extract, and peppermint extract to the butter mixture. Continue to beat until everything is well combined.
Gradually add the flour mixture to the wet ingredients. Mix until just combined. Be careful not to overmix!
Gently fold in the dark chocolate mint morsels, ensuring they are evenly distributed throughout the dough.
Using a cookie scoop or a tablespoon, drop rounded balls of dough onto the prepared baking sheets, spacing them about 2 inches apart.
Bake the cookies in the preheated oven for 10-12 minutes, or until the edges are set but the centers are still soft. They will firm up as they cool.
Remove the cookies from the oven and allow them to cool on the baking sheets for about 5 minutes before transferring them to a wire rack to cool completely. Enjoy them warm, or store them for later!
